Command Description; Test Unit Ready Command; Rezero Unit Command - Iomega ALPHA·10H Technical Description Manual

,The blocks' available.on the 10 Mbyte 8.inch removable .. ,disk.storage·.subsystem.
range from block zero to bl'ock
39~16i
for the
io
Mbyte device and to 'block
41,004 for the 10.5 Mbyte
drive~ Each block is 256 bytes in length and cor-
responds to one record of a data sector (see subsection 1.4.1.1). The range
of specified logical blocks allowed by the SCSI command structure far ex-
ceeds the blocks available on the devices. Attempts to specify a logical
·b·' ock' number· "greater·· than . the" number avai·l able ,will result in, an . . INVALID
'ADDRESS, error .. '.
2.3.3 Command Description
Implementation of the following commands may vary slightly to account for
device differences. Thus, the careful study of each command is important to
ensure proper operati·on.
2.3.3.1 Test Unit Ready Command
COMMAND
BIT
BYTE
00
01
02
o
4
o o
LOGICAL UNIT NUMBER
RESERVED
3 2
o
RESERVED
t - - -
- t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
03 RESERVED
05 VU
The TEST UNIT READY command returns zero status in the completion status
byte if the addressed unit is powered on and a cartridge is loaded. This is
not a request for unit self-test.
2.3.3.2 Rezero Unit Command
COMMAND
BIT
BYTE
00
o
6 5
fJ
LOGICAL UNIT NUMBER
1 - - - , + - - - - - -
RESERVED
4 3
2 fJ
o
I - - - i t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RESERVED
04
05 VU
The REZERO UNIT command causes a seek to track zero, and cl ears ~Yly error
status.
00701300-000
15 December 1984
2-12