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Table 4 Behavior of storage system - block option is "Volume Level" (continued)
Compatible XRC Options
Option
Setting
Level 2 Suspend
Enable*
Disable
* You cannot use this setting when the block option of XRC is set to Volume Level.
Table 5 Behavior of storage system - block option is "Cache Level"
Compatible XRC Options
Option
Setting
Level 1 SIM
Enable
Disable
Level 1
Enable
Sleep
Level 2
Disable
Suspend
Level 1
Disable
Sleep
Level 2
Enable
Suspend
Notes:
Behavior of the XP P9500 disk array
"Do not Block" is Specified by
SDM
—
Even when the amount of used
sidefile capacity exceeds the
level-2 threshold, level-2
suspension does not occur and
the storage system does not
report SCP-SCI to the host.
Behavior of the XP P9500 disk array
Do not Block is specified by SDM and Do not
Block (Volume Level) is enabled
The disk array does not report an SIM to the
host when the amount of used sidefile
capacity exceeds the sleep wait threshold.
The disk array does not perform "Sleep" -
"Wait" command retry.
Level 2 Suspend does not occur when the
amount of used sidefile capacity exceeds
the level 2 threshold. And the disk array
does not report SCP-SCI to the host.
"Do not Block"is Not Specified by SDM ("Block" is
Specified)
—
Even when the amount of used sidefile capacity
exceeds the level-2 threshold, level-2 suspension
does not occur and the storage system does not
report SCP-SCI to the host.
Do not Block is Not specified by SDM (Block
is specified) or Do not Block (Volume Level)
is disabled
If Level 1 Sleep is enabled, the disk array
reports an SIM to the host when the amount
of used sidefile capacity exceeds the sleep
wait threshold.
If Level 1 Sleep is disabled, the disk array
does not report an SIM to the host when the
amount of used sidefile capacity exceeds
the sleep wait threshold.
The disk array does not report an SIM to the
host when the amount of used sidefile
capacity exceeds the sleep wait threshold.
The disk array performs "Sleep" - "Wait"
command retry when excess of the sleep
wait threshold occurs.
Level 2 Suspend does not occur when the
amount of used sidefile capacity exceeds
1,3
the level 2 threshold. And the disk array
reports SCP-SCI to the host.
(The disk array restricts the host I/O data
flow to prioritize the retention of XRC pair
status when the used sidefile capacity is
overloaded.)
The disk array performsdoes not perform
"Sleep" - "Wait" command retry when
excess of the sleep wait threshold occurs.
Level 2 Suspend occurs when the amount of
used sidefile capacity exceeds the level 2
3
threshold.
(The disk array suspends the XRC pair to
prioritize the retention of host I/O
performance when the used sidefile capacity
is overloaded.)
Restrictions on usage
2
1 1
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