Troubleshooting a 3Ware 9550SX under 6.3

Adam Bayless adam at
Mon Jun 9 22:09:27 UTC 2008

> Caching is off; that will kill performance especially for small  
> transactions.  If you've got battery backup for this system, consider  
> enabling the onboard cache...?

Chuck, that made an immediate and huge difference:

# tw_cli set cache c0 u0 on
# dd if=/dev/zero of=testfile
5649235+0 records in
5649234+0 records out
2892407808 bytes transferred in 40.800142 secs (70892102 bytes/sec)

I had no idea having the cache on would be such a night and day difference.

I'm off to order the battery backup card.



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