SCSI Description
5-110 Maxtor Atlas 10K III
The READ CAPACITY command reports formatted capacity and track-boundary
information. The data format and field descriptions are shown in Table 5-131 and
Tab l e 5-132 res p e ct i vely.
READ CAPACITY Command- Da t a Fo rma t
READ CAPACITY Command-Field Descriptions
Tab l e 5-133 sho ws th e RE A D CA PAC IT Y Retu rn e d Data - Data Format th a t w i l l
be sent during the data-in buffer transfer for the command. Refer to the PMI
description in Table 5-132 for a description of th ese data fields.
READ CAPACITY Returned Data-Data Format
0 Ope ration Co de (25 h)
1 Reserved RelAdr
2 - 5 Logical Block Address
6 - 7 Re served
8 Reserved PMI
9 Control
RelAdr Relative Addr essing is not supported by t he drive; the field must
be 0.
Logical Block Address Used in co njunction wi th the PM I bit. Must be 0 when the PMI bi t
is 0.
PMI
Partial Media Indicator. When the value in the field is 0, the Re-
turned Lo gic al Block Addr ess (Tabl e 5-133) is that of the last lo g-
ica l s ec t or of th e log ic a l u ni t.
When the value is 1, the Returned Logi cal Bloc k Address is t hat
of the last sector on the same cylinder as the Logical Block Ad-
dress supplied in the Command Descriptor Block's LBA field. That
is, the Returned Logical Block Address is that of the Logical Block
Address before a substantial delay in data transfer will be encoun-
tered).
In eit her case, Bl ock Length in Byt es (Table 5- 133) is the unit's
logic al sector s ize, as determined by the Block Length field in t he
Mode para meter Block Desc riptor.
0 - 3 Returned Logi cal Bloc k Address
4 - 7 Block Length in Bytes