Hitachi HTS725050A9A364 Datasheet download pdf (Page 137)

7K500 OEM Specification

Page 137 of 176

14.36

14.3614.36

14.36 Set Max A

Set Max ASet Max A

Set Max Address

ddressddress

ddress (F9h)

(F9h) (F9h)

(F9h)

Command Block Output Registers

Command Block Input Registers

Data -

Feature V

Error ...See Below...

Sector Count -

LBA Low V

LBA Mid V

LBA High V

Device -

Command 1

Status ...See Below...

Error Register

Status Register

7 6 5 4 3 2 1 0

CRC

UNC

0 IDN

0 ABT

T0N

BSY

RDY

DSC

DRQ

COR

IDX

ERR

0 0 0 0 0 V 0 0

0 V 0 - - 0 0 V

Table 106 Set Max Address Command (F9h)

The Set Max Address command overwrites the max LBA/CYL of HDD in a range of actual device

capacities. The device receives this command, all accesses beyond that LBA/CYL are rejected with

setting ABORT bit in status register. Identify device command and Identify device DMA command

returns the LBA/CYL which is set via this command as a default value.

This command implement SET Max security extension commands as subcommands. But regardless

of Feature register value, the case this command is immediately preceded by a Read Native Max

Address command, it is interpreted as a Set Max Address command.

The Read Native Max Address command should be issued and completed immediately prior to

issuing Set Max Address command. Otherwise this command is interpreted as a Set Max security

extension command which is destinated by feature register. If Set Max security mode is in the

Locked or Frozen, the Set Max Address command is aborted.

For more information, see “12.10.2 Set Max security extension commands” on Page 66.

In CHS mode, LBA High, LBA Mid specify the max cylinder number. The Head number of Device

and LBA Low are ignored. The default value(See default CHS in Identify device information) is used

for that.

In LBA mode, the Head number of Device, LBA High, LBA Mid and LBA Low specify the max LBA.

This command sets this LBA as the max LBA of the device.

After a successful command completion, Identify Device response words (61:60) shall reflect the

maximum address set with this command.

If the 48-bit Address feature set is supported, the value placed in Identify Device response words

(103:100) shall be the same as the value placed in words (61:60). However, if the device contains

greater than 268,435,455 sectors, the capacity addressable with 28-bit commands, and the address

requested is 268,435,455, the max address shall be changed to the native maximum address, the

value placed in words (61:60) shall be 268,435,455 and the value placed in words (103:100) shall be

the native maximum address.

If a host protected area has been established by a Set Max Address Ext command, the device shall

return command aborted.

Output Parameters To The Device

Feature

Destination code for this command

01h

SET MAX SET PASSWORD

1 2 ... 132 133 134 135 136 137 138 139 140 141 142 ... 175 176

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