Adaptec ACB-5500 User Manual page 111

51/4" winchester disk controller scsi to st506
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Valid Errors:
Error
Error Code
Bad Argument
24H
SCSI HA/Initiator Detached Error
2DH
SCSI Bus Out Parity Check
2EH
Adapter parity Check
2FH
6.21
READ CAPACITY (25 H )
BIT
BYTE
7
6
5
4
3
2
1
0
00
--0---1--0---1--1---1--0---1--0---1---1--1---0--1---1--
01
02
03
04
05
06
07
08
Logical Unit Number
RESERVED (0)
IRel Ad
(MSB)
Loglcal Block Address
Logical Block Address
Logical Block Address
Logical Block Address
(LSB)
Reserved
(0)
Reserved
(0)
Full or Partial Media Indicator
09
Reserved
(0)
I
Flag
I
Link
-------------------------------------------------------
Figure 6-36.
READ CAPACITY Command
If the Partial Media Indicator (PMI) is 00, this command will
return the address of the last block on the unit.
It is not
necessary to specify a starting block address in this command
mode.
If the PM! is 01, this command will return the address of
the last block in the cylinder which contains the specified block
address.
This feature is useful for determining drive capacities and
determining the starting block number for cylinder
level
formatting
500504-00
6-50

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