Re: Drive configuration options with RAID (7 harddrives)


"Arie Bant" <abant@xxxxxxxx> wrote in message
news:d9vgqn$3s2$1@xxxxxxxxxxxxxxxxxxxxxxxx
> On 30/06/05 00:32, Fishhead wrote:
> > LSI Elite 1600 with 64MB of cache RAID card (SCSI)
> >
> >>
> >> What RAID card model exactly?
> >>
> >>
> >>> 160 adpatec SCSI card
> >>>
> >>> 4 36 gig 10k harddrives (160)
> >>> 1 36 gig 15k harddrive (160)
> >>> 1 74 gig 10k harddrive (160)
> >>> 1 9 gig 10k harddrive (UW2 80) (this drive can be removed if not
used)
> >>
> >>
> >>
> >>
> >> What HD models exactly?
> >
> >
> > 36GB Quantum/Maxtor Atlas III 10K (4 total)
> > 36GB Fujitsu MAM3367MC
> > 74GB Quantum Atlas II
> >
> > I don't have the exact model numbers for them all. Is there a way to
> > query windows for the numbers??
> >
> >>
> >>
> >>> 1 Plextor Cd-rom SCSI
> >
> >
> > My drives report 160 in the bios, with this plextor on the same LVD
> > cable. (The plextor does not report 160) This is with my existing
> > Adaptec 160 card.
>
> What do you mean by "My drives report 160 in the bios"? The BIOS of the
> LSI adapter? That does not give the actual speed, just the maximum
> the drive is capable of. The "UltraPlex" is not LVD capable and will
> therefor pull the whole bus down to single-ended mode.
> Get a cheap little LSI/SYMBIOS 53C810 based card for things like CDROM
> drives so you can use both LVD buses for the disks. Available from
> several manufacturers and on eBay.
> Assuming that the maximum sustained data rate of the hard disks is in
> the region of 40 MB/sec, 4 disk drives could theoretically push the bus
> to the limit (4 x 40 = 160!).

He says he has a 2 channel SCSI HDA.

> Manipulating video data can require high
> data rates, so it does make sense to limit the number of disk drives to
> four per bus.

NOPE!



.

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