HP Xw6200 Adaptec SCSI RAID 2120S: Software Reference Guide - Page 147
on this controller with no file system on it as evidenced by, displayed in
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container Commands Table 5-5 summarizes the values for the /write_cache_enable and /unprotected switches: Table 5-5. Switch Values and Results /write_cache_enable Switch Setting FALSE FALSE TRUE TRUE /unprotected Switch Setting FALSE TRUE FALSE TRUE Result The NVRAM write-back cache setting for the specified array is disabled. Not allowed. An appropriate error message displays. The NVRAM write-back cache setting for the specified array is enabled when protected. This means the controller enables the array's NVRAM write-back cache only if a battery is present and its status is OK. The NVRAM write-back cache setting for the specified array is enabled always. This means the controller forces the enabling of the array's NVRAM write-back cache even if write data could be lost due to no battery or a bad battery. Examples Before setting cache parameters for a specific array, use the container list command to obtain information about any existing arrays. As the following example shows, there is an array 0 (a volume set) on this controller with no file system on it (as evidenced by None displayed in the Usage column): AAC0>container list Executing: container list Num Total Oth Stripe Scsi Partition Dr Label Type Size Ctr Size Usage C:ID:L Offset:Size 0 Volume 15.0MB None 0:02:0 64.0KB: 15.0MB 5-99