Set Max Address Ext Command [37H] - Hitachi C4K60 - Travelstar Slim - Hard Drive Specifications

7.5.37. Set Max Address EXT Command [37h]

Task File Register
Command
Feature
LBA High
LBA Mid
LBA Low
Sector Count
Device
The SET MAX ADDRESS EXT command overwrites the maximum 48-bit LBA address of the device in a
range of actual device capacity. Once the device receives this command, all accesses beyond that LBA or
cylinder are rejected. IDENTIFY DEVICE command returns the LBA or Cylinder, which is set via this
command as default.
Bit 0 "B" of Sector Count Register is option bit for selection whether nonvolatile. When B = 1, Maximum LBA
which is set by SET MAX ADDRESS EXT command is preserved over power-on, hardware reset, software
reset. When B = 0, Maximum LBA which is set by SET MAX ADDRESS EXT command will be lost by
power-on or hardware reset. B set to one is not valid when the device is in Address Offset Mode. ABRT is
set if B set to one when the device is in Address Offset mode.
READ NAX ADDRESS EXT command should be issued and completed immediately prior to issuing SET
MAX ADDRESS EXT command. If the device receives SET MAX ADDRESS EXT command without a prior
READ MAX ADDRESS EXT command, the device aborts the SET MAX ADDRESS EXT command. After
successful completion of this command, all accesses beyond that LBA will be rejected with setting ID not
found error. If the device receives a second nonvolatile SET MAX ADDRESS EXT command (B=1) after a
power on or hardware reset, the device reports an ID Not Found error.
If the maximum value to be set exceeds the capacity of the device, or the device is in the Set Max Locked or
Set Max Frozen state, then the device returns command aborted. If a protected area has been established
by a SET MAX ADDRESS command, the device returns command aborted.
K6610170
Rev.2
Dec 22, 2004
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
7 6 5
Maximum LBA bit 47 - 40
Maximum LBA bit 23 - 16
Maximum LBA bit 39 - 32
Maximum LBA bit 15 - 8
Maximum LBA bit 31 - 24
Maximum LBA bit 7 - 0
X 1 X
- 100 -
4 3 2
37h
XX
XX
XX
XX
DEV X X
1 0
B
X X