Hp StorageWorks XP Remote Web Console Software Manual de usuario descargar pdf (Pagina 17)

also occur on the ports that are not connected to the S-VOL that rejected the host access. You need to

terminate the application software which monitors the volumes in order to solve these problems.

Use RAID Manager commands to operate XP Snapshot pairs. However, whether or not the operations

complete normally depends on the status of the pairs. The table below shows the pair statuses and the

results of the RAID Manager commands.

Table 3 Pair Statuses and the Results of the RAID Manager Commands

Pair

Status

RAID Manager Command

paircreate paircreate

−split

pairsplit

pairresync pairresync

-restore

pairsplit

-S

pairsplit

-E

SMPL OK No No No No NOP No

COPY

NOP No No NOP NOP No No

PAIR /

PFUL

NOP

OK OK

NOP NOP

PSUS /

PFUS

No NOP NOP OK OK OK No

SMPL(PD) No No No No No NOP No

COPY(RS)

NOP No No NOP NOP No No

COPY(RS-R) NOP No No NOP NOP No No

PSUE

No No No

OK*

NOP

OK: The command executes the process and ends normally.

NOP: Thecommand does notexecute theprocess,but ends normally.

No: The command ends abnormally (that is, command rejected).

Note*:

If you issue the pairresync command to the pair whose status has changed to PSUE because of

the shortage of the shared memory for the V-VOL management area, the command will be rejected

and end abnormally.

When the command executes the process and ends normally, the pair status changes according to the

process. For information about how the pair status changes when the command ends normally, see

Figure 3 on page 15 and the paragraphs under the ﬁgure.

Note

: The hide mode (-m noread) on the S-VOL is not supported. If you specify the hide mode on the

S-VOL and create a pair, the command will end normally, but the hide mode will be ignored.

Copy Threshold Option

If the load of the storage system increases, host server I/O performance (response) may be degraded. If

XP Snapshot performs the restore operation when the load of the subsystem is heavy, it is more likely that

host server I/O performance (response) may be degraded. The Copy Threshold option temporarily stops

copy processing caused by the restore operation when the load of the subsystem is heavy. If you set this

option in effect, you can minimize the degradation of host I/O performance by temporarily stopping

copy processing caused by the restore operation when the load of the subsystem is heavy.

The Copy Threshold option is effective only when the load of the subsystem is heavy. When the Copy

Threshold option is in effect, all the copy proc

essing by the restore operation stops. For information about

the setting of the Copy Threshold option, call

HP technical support.

Note:

Copy operations that are stopped by the C

opy Threshold option will resume when the load of the

subsystem become light. If this option is in effect, not only XP Snapshot copy operations, but also the

copy operations of the following program products, will stop when the load of the subsystem is heavy:

• Business Copy

• ShadowImage for Mainframe

XP24000 Snapshot User's Guide

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