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Physical tracks per physical
cylinder
(user area) (number of
heads)
8
Physical disk platters (user
area)
(numbers of disks)
4
Sector length (byte)
520 (512)
Seek time (ms) (read/write)
MIN
0.2/0.4
MAX
6.7/7.4
AVE
3.5/4.0
Average latency time (ms)
2.01
Internal data transfer rate
(MB/sec)
120 to 202
Max. interface data transfer
rate (MB/sec
Max 400
Diagram of the Prior Generation ST 9985. The HDD and DC to DC converter are built in the same canister.
Power Connector
Disk Drive Interface Connector
Disk Drive
DC-DC Converter
(DC56V
DC5/12V)
However, in the new ST 9985 V, you can see that the DC to DC converter is not built into the canister.
Just the Facts
October 2007
44
Sun Confidential – For Internal Use and Authorized Partner Use Only
In the canister that is mounted with the HDD above,
the DC-DC converter, which converts 56V DC to 5V
and 12V DC used by the HDD, is installed.