HP 220mx Guia do Utilizador descarregar pdf (Página 74)

100

101

SCSI-2 Drive Command Set

Mode Select Command (15H)

Chapter 2 2-37

SCSI-2 Drive Commands

Caching Page 08H

The caching parameters table defines the parameters that affect the use

of the cache.

NOTE With write caching enabled, data integrity of the information in the buffer

is not guaranteed through power cycling.

WCE A Write Cache Enable bit of 1 indicates write caching is

enabled.

A Write Cache Enable bit of 0 indicates write caching is

disabled.

RCD A Read Cache Disable bit of 1 indicates read ahead is

disabled.

A Read Cache Disable bit of 0 indicates read ahead is

enabled.

Table 2-32 Caching Page 08H

Byte 7 6 5 4 3 2 1 0

0 Reserved (0) Page Code (08H)

1 Page Length (0AH)

2 Reserved (0) WCE MF RCD

3 Reserved (0)

4 Disable Pre-fetch Transfer Length (MSByte)

5 Disable Pre-fetch Transfer Length (LSByte)

6 Minimum Pre-fetch (MSByte)

7 Minimum Pre-fetch (LSByte)

8 Maximum Pre-fetch (MSByte)

9 Maximum Pre-fetch (LSByte)

10 Maximum Pre-fetch Ceiling (MSByte)

11 Maximum Pre-fetch Ceiling (LSByte)

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 377 378

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