[ILUG] Dell PERCs and Linux
longword at esatclear.ie
Sun Jun 18 13:23:36 IST 2000
Paul Jakma wrote:
> > A clear, if slight, win for RAID 5.
> what does the dmesg say about the RAID5 speed. probably RAID5 is
> /very/ cpu limited here.
raid5: measuring checksumming speed
raid5: trying high-speed SPARC checksum routine
SPARC : 17.145 MB/sec
8regs : 14.478 MB/sec
32regs : 13.335 MB/sec
using fastest function: SPARC (17.145 MB/sec)
The whole system is rather slow - old SCSI, old disk, old CPU so it sort
of balances out. With a decent sized file operation on an unloaded
machine, it shouldn't really matter how slow the CPU is so long as it
can provide data faster than the disks need it.
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