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Fast write cache

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terrapin

MIS
May 4, 2000
21
US
Are there any concerns on turning on fast write ssa adapter.Does it require rebooting?
I did try but on running system but returned device in use.
 
when I create my arrays, I always turn on fast write and have never had to reboot to enable it. Could the disk already have been part of a VG? I've looked and can't see where you can turn on fast write after the disk has been made part of an array.
 
How to enable fast cache:

Unmount the filesystems(s) on the hdisk to be modified

Smitty --> Devices --> SSA Disks --> SSA Logical Disks

Change/Show Characteristics of an SSA Logical Disk

Pick the hdisk

Set enable Fast-Write to Yes

 
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