Xor Control Mode Page (10H) - Seagate SCSI Interface Product Manual

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5.12.11

Xor Control Mode page (10h)

The Xor Control Mode page (Table 100) provides the initiator with the means to obtain or modify certain Xor
operating parameters of the target.
Table 100: Xor Control Mode page (10h)
Bit 7
Byte
0 PS
1 Page Length (16h)
2
3 Reserved
4 (MSB)
5
6
7
Changeable [6]
8 (MSB)
9
10
11
Changeable [6]
12 (MSB)
13
14
15
Changeable [6]
16 (MSB)
17
18
19
Changeable [6]
20
Reserved
21
Changeable [6]
22
Rebuild Delay [5]
23
Changeable [6]
Notes.
[1] An Xor Disable (XorDis) bit of zero enables the Xor operations within a device. An XorDis bit of one dis-
ables the Xor operations within a device. If the XorDis bit is set to one and an Xor command is sent to the
target, the command shall be terminated with Check Condition status. The sense data shall be set to Ille-
gal Request: Invalid Command Operation Code.
[2] The Maximum Xor Write Size field specifies the maximum transfer length in blocks that the target accepts
for a single XDWrite Extended, XDWrite, or XPWrite command.
[3] The Maximum Regenerate Size field specifies the maximum regenerate length in blocks that the target
accepts for the Regenerate command.
[4] The Maximum Rebuild Read Size field specifies the maximum rebuild length in blocks that the target shall
use for Read commands during a rebuild operation. This field does not limit the rebuild size.
6 5
Reserved
Reserved
Maximum Xor Write Size [2]
Maximum Regenerate Size [3]
Maximum Rebuild Read Size [4]
SCSI Interface Product Manual, Rev. J
4 3
Page Code (10h)
Reserved
2 1
XorDis [1] Reserved
(LSB)
(LSB)
(LSB)
(LSB)
0