more RAM + faster disk -> slower box?!
ip at mcc.ac.uk
Thu Nov 29 16:35:50 GMT 2001
> Damn you! Well, my excuse is that my degree is Software Engineering, and I
> leave hardware to the lamers. :-)
I wish _I_ could, but we get only the lamest of the lame here.
> I hope you're joking. :-)
> I still think your disks are going to cause problems though. OK, it wasn't
> the cause of *this* problem, but I still say putting different speed disks in
> the same box is going to cause at minimum a bottle-neck in terms of
> performance, and if different RPMs on the same RAID controller, potentially
> hardware problems as well.
Nah. They're not on the RAID controller anyway -- its a SCSI<->IDE thing with
a bunch of crap disks on the IDE side. The two relatively fast SCSI disks are
a vinum mirror; if I could find a way to prefer the faster disk without
rebuilding the entire vinum configuration I'd do that. Anyone?
My previous generation news box had a SparcStorage Array with 8*1GB RAID 1+0'ed
with an original vintage Seagate 9GB brick. Few problems with that, and it's
still being used for my (and certain stealth users) home directories.
In a nutshell, I reckon you're wrong -- not about the performance, but about
other potential problems. I dunno about hardware RAID controllers, but vinum
(and DiskSuite, and before that, Veritas) seem perfectly happy.
> All hardware is crap
Hey, you tell that to my Suns and they'll punch you in the nose!
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