Set Features command. Seagate ST1000VNZ02 IronWolf 1TB, ST1000VN002 IronWolf 1TB, ST3000VN006 IronWolf 3TB, ST6000VN001 IronWolf 6TB, ST4000VN006 IronWolf 4TB, ST3000VN007 IronWolf 3TB, ST2000VN004 IronWolf 2TB, ST4000VN008 IronWolf 4TB

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SATA Interface

82

H

86

H

90

H

AA

H

F1

H

06

H

07

H

10

H

55

H

4.3.2 Set Features command

This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows:

Table 15 Set Features commands

02

H

Enable write cache (default).

03

H

Set transfer mode (based on value in Sector Count register).

Sector Count register values:

00

H

Set PIO mode to default (PIO mode 2).

01

H

Set PIO mode to default and disable IORDY (PIO mode 2).

08

H

PIO mode 0

09

H

PIO mode 1

0A

H

PIO mode 2

0B

H

PIO mode 3

0C

H

PIO mode 4 (default)

20

H

Multiword DMA mode 0

21

H

Multiword DMA mode 1

22

H

Multiword DMA mode 2

40

H

Ultra DMA mode 0

41

H

Ultra DMA mode 1

42

H

Ultra DMA mode 2

43

H

Ultra DMA mode 3

44

H

Ultra DMA mode 4

45

H

Ultra DMA mode 5

46

H

Ultra DMA mode 6

Enable the PUIS feature set

PUIS feature set device spin-up

Enable use of SATA features

Disable read look-ahead (read cache) feature

Disable write cache

Disable the PUIS feature set

Disable use of SATA features

Enable read look-ahead (read cache) feature (default).

Report full capacity available

Note

At power-on, or after a hardware or software reset, the default values of the features are as indicated above.

Seagate IronWolf Product Manual, Rev. R 37