HP XP P9500 Storage - Manual (Page 11)

Table 4 Behavior of storage system - block option is "Volume Level" (continued)
Behavior of the XP P9500 disk array Compatible XRC Options
"Do not Block"is Not Specified by SDM ("Block" is
Specified) "Do not Block" is Specified by
SDM Setting Option
— — Enable* Level 2 Suspend
Even when the amount of used sidefile capacity
exceeds the level-2 threshold, level-2 suspension Even when the amount of used
sidefile capacity exceeds the Disable
does not occur and the storage system does not
report SCP-SCI to the host. level-2 threshold, level-2
suspension does not occur and
the storage system does not
report SCP-SCI to the host.
* 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”
Behavior of the XP P9500 disk array Compatible XRC Options
Do not Block is Not specified by SDM (Block
is specified) or Do not Block (Volume Level)
is disabled Do not Block is specified by SDM and Do not
Block (Volume Level) is enabled Setting Option
If Level 1 Sleep is enabled, the disk array
reports an SIM to the host when the amount The disk array does not report an SIM to the
host when the amount of used sidefile
capacity exceeds the sleep wait threshold. Enable Level 1 SIM
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. Disable
The disk array performs "Sleep" - "Wait"
command retry when excess of the sleep
wait threshold occurs. The disk array does not perform "Sleep" -
"Wait" command retry.
Level 2 Suspend does not occur when the
amount of used sidefile capacity exceeds
Enable Level 1
Sleep
Disable Level 2
Suspend
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.
1,3
the level 2 threshold. And the disk array
reports SCP-SCI to the host.
2
(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. Disable Level 1
Sleep
Enable Level 2
Suspend
Level 2 Suspend occurs when the amount of
used sidefile capacity exceeds the level 2
threshold.
3
(The disk array suspends the XRC pair to
prioritize the retention of host I/O
performance when the used sidefile capacity
is overloaded.)
Notes:
Restrictions on usage 11