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In this document:
HP Surestore Disks C2244, C2245, C2246, and C2247 technical specifications
 Disk drive capacities
HP Surestore Disks C2244, C2245, C2246, and C2247 disk drive capacities
These numbers are for comparison only. Capacities are calculated using a 512 byte sector. When other sector sizes are used, formatted capacity will change. Unformatted capacities are given in parentheses ( ).
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Zone 0 (Outer)
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Zone 1
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Zone 2
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Zone 3
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Zone 4
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Zone 5
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Zone 6
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Zone 7 (Inner)
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Data tracks per surface:
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533
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192
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136
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144
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138
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318
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268
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252
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Data sectors per track:
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96
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92
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88
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84
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80
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72
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64
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56
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Data bytes per track:
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49,152
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47,104
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45,056
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43,008
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40,960
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36,864
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32,768
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28,672
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(58,899)
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(56,338)
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(53,968)
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(51,440)
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(49,034)
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(44,079)
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(39,351)
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(34,391)
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Data sectors per cylinder:
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C2244
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672
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644
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616
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588
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560
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504
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448
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392
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C2245
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864
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828
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792
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756
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720
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648
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576
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504
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C2246
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1,056
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1,012
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968
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924
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880
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792
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704
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616
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C2247
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1,248
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1,196
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1,144
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1,092
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1,040
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936
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832
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728
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Data bytes per cylinder:
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C2244
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344,064
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329,728
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315,392
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301,056
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286,720
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258,048
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229,376
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200,704
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(412,293)
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(394,366)
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(377,776)
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(360,080)
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(343,238)
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(308,553)
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(275,457)
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(240,737)
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C2245
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442,368
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423,936
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405,504
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387,072
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368,640
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331,776
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294,912
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258,048
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(530,091)
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(507,042)
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(485,712)
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(462,960)
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(441,306)
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(396,711)
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(354,159)
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(309,519)
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C2246
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540,672
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518,144
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495,616
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473,088
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450,560
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405,504
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360,488
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315,392
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(647,889)
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(619,718)
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(593,648)
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(565,840)
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(539,374)
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(484,869)
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(432,861)
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(378,301)
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C2247
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638,976
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612,352
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585,728
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559,104
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532,480
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479,232
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425,984
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372,736
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(765,687)
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(732,394)
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(701,584)
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(668,720)
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(637,442)
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(573,027)
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(511,563)
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(447,083)
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C2244
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C2245
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C2246
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C2247
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Data surfaces per drive:
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7
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9
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11
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13
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Data bytes per sector:
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512 (610)
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512 (610)
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512 (610)
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512 (610)
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Data sectors per surface:
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158,096
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158,096
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158,096
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158,096
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Data bytes per surface:
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80,945,152
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80,945,152
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80,945,152
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80,945,152
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Data cylinders per drive*:
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1,981
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1,981
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1,981
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1,981
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Data sectors per drive:
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1,106,288
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1,422,480
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1,738,672
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2,054,864
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Data bytes per drive:
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566,419,456
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728,309,760
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890,200,064
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1,052,090,368
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(678,438,799)
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(872,345,769)
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(1,066,252,739)
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(1,260,159,709)
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NOTE: * There are 2051 total cylinders per drive, allocated as follows: 1981 data cylinders, 69 spare cylinders, and 1 cylinder reserved for logs and maintenance information. Partial cylinders have been rounded to the next whole cylinder.
Operating specifications
HP C2244/45/46/47 Operating specifications
NOTE: The C2244/45/46/47 disk drives must be operated within the Disk Drive Environmental Requirements specified in Table 1-4 in order for them to function properly.
Interface
Industry Standard SCSI-2
Controller
Overhead time
| Less than 500 microseconds
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Buffer size
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256 kbytes
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Buffer type
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dual-ported
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Sector size
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180 - 744 data field bytes
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Interleave
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1:1
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Seek times (includes settling time)
Track to Track Seek
| 2.5 milliseconds
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Head Switch Time
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Less than 1 millisecond
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Average Random Seek
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Reads
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10.2 milliseconds
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Writes
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11.2 milliseconds
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Maximum Seek
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22 milliseconds
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NOTE: Seek time is defined as the time from when the actuator begins to move until the head has settled over the target. track.. It does not include any controller overhead time or any initiator overhead time. The values above are derived from a representative sample of disk drives measured under normal temperature and voltage conditions.
Track to track seek time is the mean value of all seek times measured when performing all possible single track seeks.
Average random seek time is the time to do all possible seeks divided by the number of seeks possible.
Maximum seek time is the time it takes to seek 2051 physical cylinders.
Head Switch time is the time required to switch from one head to the next head in sequential order (head 0 to head 1, head 1 to head 2, etc.).
Spin-up Time
From Power-On to ready for access
From Power-On to SCSI bus selection
- Typical: 3 seconds
- Maximum:5 seconds
Rotational latency (average time)
Internal data transfer rates (controller/disk)
Burst Rates (for single sector transfers)
| Sustained Rates (for continuous transfers; excludes controller overhead)
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Inner Zone to Outer Zone
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Inner Zone to Outer Zone
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3.1 to 5.3 MB (24.8 to 42.4 Mbits) per second
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2.1 to 3.7 MB (17.1 to 29.5 Mbits) per second
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External data transfer rate (host/controller)
Narrow Single-Ended/Differential
| Wide Differential
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Asynchronous: 2.5 MB per second
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Asynchronous: 5.0 MB per second
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Synchronous: up to 10.0 MB per second
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Synchronous: up to 20 0 MB per second
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Recoverable data error rate
Less than ten (10) errors in 10 to the thirteenth power bits transferred when the disk drive is operated within the specified environmental limits.
NOTE: A recoverable data error occurs when a read or write operation successfully completes with the execution of a recovery algorithm. The recovery action is reported to the host with a Sense key of 1. (Refer to the Request Sense command in Appendix A.) Mode pages must be in the factory default states.
Unrecoverable data error rate
Less than ten (10) errors in 10 to the fifteenth power bits transferred when the disk drive is operated within the specified environmental limits.
NOTE: An un-recoverable data error occurs when a read or write operation does not successfully complete with the execution of a recovery algorithm. The unsuccessful operation is reported to the host with a Sense Key of 3. (Refer to the Request Sense command in Appendix A.) Mode pages must be in the factory default states.
Less than ten (10) seek errors in 10 to the seventh power seeks when the drive is operated within the specified environmental limits.
NOTE: A seek error occurs when the drive does not successfully locate the desired cylinder and head
- Bit Density: 1968 bits per mm (49,987 bits per inch)
- Track Density: 91 tracks per mm (2304 tracks per inch)
1,7 Run Length (RLL) Code
Electromagnetic emissions
Current Electromagnetic Compatibility (EMC) regulations do not specify or require testing at the component (standalone) level since EMC is highly dependent upon the characteristics of the system in which the product is installed.
Although regulatory testing is not required, these products have been characterized as individual components using Hewlett-Packard standardized tests.
Typical values measured as average sound pressure at one meter per ISO 7779; converted to average sound power (in bels) per ISO 7779.
- A-Weighted Sound Pressure: 35 db(A)
- Sound Power: 4.6 bels
- A-Weighted Sound Pressure: 37 db(A)
- Sound Power: 4.8 bels
IEC: 950, 2nd Edition, Amendment 1
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UL: 1950, 2nd Edition
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CSA: C22.2 No . 950-M 89
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EN: 60950, 1988
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TUV: EN 60950, 1988; DIN VDE 0805/05.90
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DEMKO: EMKO-TUE (74-SEC) 203/91
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Unit Weight: 1.0 kg (2.2 lbs.)
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Shipping Weight (Single-Unit Package): 1.6 kg (3.5 lbs.)
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Shipping Weight (Ten-Unit Package): 11.5 kg (25 lbs.)
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Length: 46.1 mm (5.75 inches)
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Width: 101.6 mm (4.00 inches)
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Height: 41.3 mm (1.63 inches)
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Environmental requirements
The environmental requirements for proper operation of the HP C2244/45/46/47.
HP C2244/45/46/47 environmental requirements
- Voltages: +5 V, + 12 V
- Regulation: +/-5 degrees K
- (+/-10 degrees percent] tolerance allowed for +12V during start-up.)
- +5 V: less than 100 mVp-p
- +12 V: less than 200 mVp-p
- Operating: 5°C to 50°C (41°F to 122°F)
- Non-operating: -40°C to 65°C (-40°F to 149°F)
- (Maximum rate of change shall not exceed 20°C (36°F) per hour.)
- Narrow, Single-Ended Drives: 3 to 5 cfm
- Narrow, Differential Drives: 3 to 5 cfm
- Wide, Differential Drives: 3 to 5 cfm
- Operating: 8% to 80% with wet bulb limit of 28°C
- Non-operating (storage and shipping): 5% to 90% with wet bulb limit of 28°C
- (Excludes all conditions which can cause condensation in or on the disk drive.)
- Operating: -305 m (-1,000 feet) to 3,048 m (10,000 feet) above sea level.
- Non-operating: -305 m (- 1,000 feet) to 15,240 m (50,000 feet) above sea level
The disk drive will meet all performance specifications on any of the major mounting axes.
Tilt
The disk drive will meet all performance specifications on any of the major mounting axes.
Shock
Applied Acceleration (half sine): 3.0 g (peak), 11 milliseconds. The drive meets recoverable and unrecoverable data error rate specifications with no recoverable or unrecoverable hardware faults. Mode pages must be in factory default state.
Applied Acceleration (half sine): 10.0 g (peak), 11 milliseconds. The drive meets unrecoverable data error rate specifications with no unrecoverable hardware faults. Mode pages must be in factory default state.
Applied Acceleration (half sine): 50 g (peak), 11 milliseconds. The drive meets recoverable and unrecoverable data error rate specifications with no recoverable or unrecoverable hardware faults and no damage to the mechanism. Mode pages must be in factory default state.
NOTE: A recoverable hardware fault occurs when the drive detects a hardware error, such as a seek or track following error, and successfully completes the operation with the execution of a recovery algorithm. The recovery action is reported to the host with a Sense Key of 1. Mode pages must be in the factory default states.
An un-recoverable hardware fault occurs when the drive detects a hardware error, such as a seek or track following error, and does not successfully complete the operation with the execution of a recovery algorithm. The unsuccessful operation is reported to the host with a Sense Key of 4. Mode pages must be in the factory default states.
Swept sine vibration
Applied Acceleration: 0.25 g (peak), 5 to 500 Hz. The drive meets recoverable and unrecoverable data error rate specifications with no recoverable or unrecoverable hardware faults. Mode pages must be in factory default state.
Applied Acceleration: 0.5 g (peak), 5 to 500 Hz. The drive meets unrecoverable data error rate specifications with no unrecoverable hardware faults. Mode pages must be in factory default state.
Applied Acceleration: 2.0 g (peak), 5 to 500 Hz. The drive meets recoverable and unrecoverable data error rate specifications with no recoverable or unrecoverable hardware faults and no damage to the mechanism. Mode pages must be in factory default state.
Electromagnetic compatibility (EMC)
Current EMC regulations do not specify or require testing at the component (standalone) level since EMC is highly dependent upon the characteristics of the system in which the product is installed.
Although regulatory testing is not required, these products have been characterized as individual components using Hewlett-Packard standardized tests. These tests are summarized below.
Electromagnetic susceptibility
- less than 3V/m from 14 kHz to 1 GHz
- +5 V: less than 200 mVp-p from 100 kHz to 250 MHz
- +12 V: less than 400 mVp-p from 100 kHz to 250 MHz
- Less than 4 gauss, 47.5 to 198 Hz
Copyright (C) Hewlett-Packard Co. 1998
This information is subject to change without notice and
is provided "as is" with no warranty.
Hewlett-Packard shall not be liable for any direct,
indirect, special, incidental or consequential damages
in connection with the use of this material.
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