Table 2.3 Disk Drive Specifications - Hitachi 9900 User And Reference Manual

Table 2.3 Disk Drive Specifications
Parameter
Formatted capacity (GB)
Platter diameter
Physical cylinders (user area)
Physical tracks per physical cylinder
(number of heads)
Physical disk platters (user area)
(numbers of disks)
Sector length (byte)
Seek time (ms)
(Read/Write)
Revolution speed (rpm)
Average latency time (ms)
Internal data transfer rate (MB/sec)
Max. interface data transfer rate
(MB/sec)
*Caution and notes for the 180-GB HDDs:
Caution: The 180-GB HDDs should not be intermixed with other HDD types in the same
array domain (behind the same ACP pair). If 180-GB HDDs are used, all HDDs in that
array domain should also be 180-GB HDDs.
Note: Subsystems which contain the 180-GB HDDs do not have the same availability or
serviceability as those subsystems which do not contain 180-GB HDDs. Some offline
maintenance may be required.
Note: The 180-GB HDDs are intended for archival use and do not have characteristics
that make them suitable as performance devices.
22 Chapter 2 Subsystem Architecture and Components
73 GB
72.91
3 inches
15,154
24 (DKR1C)
10 (DKR2D)
12 (DKR1C)
5 (DKR2D)
520(512)
MIN. 0.5/0.7
MAX. 12.0/13.0
AVE. 5.7/6.5
10,025
2.99
33.6 to 56.6 30.2 to 45.6 30.2 to 45.6 57.3 to 99.9 35.3 to 63.5
100
Disk Drive Type
47 GB 18 GB 146 GB
47.19 18.46 143.7
3 inches 3 inches 3 inches
12,027 12,027 n/a
23 (DKR1B) 9 (DKR2B) 10
16 (DKR1C) 6 (DKR2C)
12 (DKR1B) 5 (DKR2B) 5
8 (DKR1C) 3 (DKR2C)
520(512) 520(512) 520 (512)
0.5/0.7 0.5/0.7 0.5/0.7
12.0/13.0 12.0/13.0 10.0/11.0
5.7/6.5 5.2/6.0 4.9/5.4
10,025 10,025 10,025
2.99 2.99 2.99
100 100 100
180 GB*
172.55
3 inches
24,247
24
12
520(512)
0.8 / 1.1
16.0 / 17.0
7.4 / 8.2
7,200
4.17
100