i created an array group with the dos util 'dptmgr' from default
using IOZONE and Bonnie, i create a 128MB file for read/write
i am aware of the performance implications of RAID-5, but I am getting
about 2MByte/sec max write transfer rate compared with 19MByte/sec on
For a pci ultrawide controller, are these figures suspect? What kind of
write performance hit should one expect w/RAID-5 ?
No, those figures are typical for RAID5 on the DPT PM334 when used with
the default stripe size.
However, do you want to optimize your system for bonnie/iozone
(sequentional and single-user)? If so, there are lot of things you can
change. However, then random-access, multi-user things don't benchmark
I have a DPT PM334UW in a mail server with a 5 disk RAID5 array, and I'm
constantly amazed about how well it performs real-world tasks.
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