Sector Addressing Mode - IBM DTTA-351010 - Deskstar 10.1 GB Hard Drive Specifications

the BSY bit whenever it is ready to accept commands. Device 0 may assert DASP-
to indicate device activity.
Hard Reset, Soft Reset
If Device 1 is present Device 0 shall read PDIAG- to determine when it is valid to
clear the BSY bit and whether Device 1 has reset without any errors, otherwise
Device 0 shall simply reset and clear the BSY bit. DASP- is asserted by Device 0
(and Device 1 if it is present) in order to indicate device active.
Execute Device Diagnostic
If Device 1 is present, Device 0 shall read PDIAG- to determine when it is valid to
clear the BSY bit and if Device 1 passed or failed the EXECUTE DEVICE DIAG-
NOSTIC command, otherwise Device 0 shall simply execute its diagnostics and then
clear the BSY bit. DASP- is asserted by Device 0 (and Device 1 if it is present) in
order to indicate the device is active.
In all the above cases: Power on, RESET-, Soft reset, and the EXECUTE DEVICE DIAGNOSTIC
command the Device 0 Error register is shown in Figure 65.
D e v i c e 1 P D I A G
P r e s e n t ? A s s e r t e d ?
Y e s
Y e s
Y e s
Y e s
N o ( n o t r e a d )
N o ( n o t r e a d )
W h e r e x i n d i c a t e s t h e a p p r o p r i a t e D i a g n o s t i c C o d e f o r
t h e P o w e r o n , R E S E T - , S o f t r e s e t , o r D e v i c e D i a g n o s t i c
e r r o r .
Figure 65. Reset error register values

10.3 Sector Addressing Mode

All addressing of data sectors recorded on the device's media is by a logical sector address. The logical CHS
address for DTTA-3xxxxx is different from the actual physical CHS location of the data sector on the disk
media.
DTTA-3xxxxx support both Logical CHS Addressing Mode and LBA Addressing Mode as the sector
addressing mode.
The host system may select either the currently selected CHS translation addressing or LBA addressing on a
command-by-command basis by using the L bit in the DEVICE/HEAD register. So a host system must set
the L bit to 1 if the host uses LBA Addressing mode.
D e v i c e 0
P a s s e d
Y e s Y e s
Y e s N o
N o Y e s
N o N o
Y e s
N o
E r r o r
R e g i s t e r
0 1 h
0 x h
8 1 h
8 x h
0 1 h
0 x h
General Operation Descriptions
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