I would like to perform some tests with WriteThrough
and WriteBack
. Is it safe to change these settings on a production system? The RAID controller doesn't have a BBU so I would like to enable WriteBack
just for the duration of the test (sysbench):
# ./MegaCli64 -LDInfo -L0 -a0 | grep "Current Cache Policy:"
Current Cache Policy: WriteThrough, ReadAdaptive, Direct, No Write Cache if Bad BBU
# ./MegaCli64 -LDSetProp WB -L0 -a0
Best Answer
I did this several times on a test server without any problems. Also, I never read any warning or something like that to not do that online. So I guess this should be safe.
As you don't have a BBU, you need this command as well:
Change back with: