HP XP7 Storage - Manual (Page 11)

Behavior of the HP XP7 Storage disk array Compatible XRC Options
"Donot Block" is Not Specified by SDM ("Block" is
Specified) "Donot Block" is Specified by
SDM Setting Option
The storage system does not report an SIM to the
host when the usage of sidefile exceeds the sleep
wait threshold. The storage system does not
report an SIM to the host when
the usage of sidefile exceeds
the sleep wait threshold. Disable
— — 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.
The following table shows the behavior of a storage system when the block option is “Cache Level.”
Behavior of the HP XP7 Storage disk array Compatible XRC Options
Donot Block is Not specified by SDM (Block
is specified) or Donot Block (Volume Level)
is disabled Donot Block is specified by SDM and Donot
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 the "Sleep" -
"Wait"
command retry when excess of the
sleep wait threshold occurs.
The disk array does not perform the
"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 does not perform the
"Sleep" - "Wait"
command retry when
excess of the sleep wait threshold occurs.
Disable Level 1
Sleep
Restrictions on usage 11