Dell 34XX, 38XX, 32XX Cache Flush Modifier, Cache Without Battery Enabled, Modification Priority

Cache Flush Modifier

Valid values for the cache flush modifier are listed in the following table.

Value	Description
Immediate	Data is flushed as soon as it is placed into the
	cache.
250	Data is flushed after 250 ms.
500	Data is flushed after 500 ms.
750	Data is flushed after 750 ms.
1	Data is flushed after 1 s.
1500	Data is flushed after 1500 ms.
2	Data is flushed after 2 s.
5	Data is flushed after 5 s.
10	Data is flushed after 10 s.
20	Data is flushed after 20 s.
60	Data is flushed after 60 s (1 min.).
120	Data is flushed after 120 s (2 min.).
300	Data is flushed after 300 s (5 min.).
1200	Data is flushed after 1200 s (20 min.).
3600	Data is flushed after 3600 s (1 hr).
Infinite	Data in cache is not subject to any age or time
	constraints. The data is flushed based on other
	criteria that are managed by the RAID controller
	module.

Cache Without Battery Enabled

Write caching without batteries enables write caching to continue if the RAID controller module batteries are completely discharged, not fully charged, or not present. If you set this parameter to TRUE without an uninterruptible power supply (UPS) or other backup power source, you can lose data if the power to the storage array fails. This parameter has no effect if write caching is disabled.

Modification Priority

Modification priority defines the amount of system resources that are used when modifying virtual disk properties. If you select the highest priority level, the virtual disk modification uses the most system resources, which decreases the performance for host data transfers.

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