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Re: Hard Drives
It is unlikely that you will saturate the PCI bus, streaming data from SATA
hard drives using a PCI card. I use SCSI 160 HD's in my PC (10k Compaq
server
drives) using a PCI card and the PCI bus does not get saturated (SCSI
transfers
twice as much data as ATA as it reads and writes to the databus
synchronously).
I have just finished helping a friend build a video editing machine with 2
SATA
PCI cards and 4 WD Raptors in it (It gets very hot !!!) and we have had no
problems there either.
Be aware that sticking 2 160 Gb HDs in your dimension will produce a fair
ammount of heat inside the case (If you use 10k rpm drives these will get
so
hot that you will not be able to touch them !!) You may want to look at HD
coolers or extra case fans. Dells run very quiet in general as they use as
much
passive cooling technology as they can, figure on seeing upto another 20oc
inside your case with you upgrade, this may impact on the temperature that
your
CPU runs at (I had to upgrade my heatsink and fan when I started using my
scsi
160's !!)
Simon
Quoting Richard Malcolm-Smith <rich@xxxxxxx>:
> <html><body>
>
>
> <tt>
> > You will need either a mobo that supports Serial ATA or a PCI
card to
> <BR>
> > hang the drives off.<BR>
> <BR>
> You definatly do not want to get a PCI card or an onboard one that
uses a PCI
> <BR>
> based chip, normal old PCI on desktop PCs can only handle 133 MB/Sec,
and if
> you <BR>
> have a LAN card and other things on the PCI bus you will see
lag.<BR>
> <BR>
> With my software raid-5 I see better performance when I use inbuilt
lan (100
> <BR>
> meg) vs a gigabit card in the machine. All fingers point to PCI being
> saturated.<BR>
> <BR>
> AFAIK, only the intel chipsets have the SATA built into the chipset,
and then
> <BR>
> its only 2 channels of it anyway.<BR>
> <BR>
> >>Drives will be for media storage (Wav etc.)
only.<BR>
> > <BR>
> > <BR>
> > For storage, you're not likely to notice much difference - if
hot swap
> <BR>
> > is something that would be useful to you then maybe, or if
you were
> <BR>
> > putting in a stack of drives and wanted neater cabling (yeah,
I know you
> <BR>
> > can get rounded IDEs :p ) I'd be inclined to look at the
cheapest <BR>
> > option, since you're unlikely to get much added value from
SATA in your
> <BR>
> > application.<BR>
> <BR>
> For me it was the cable length issue, parallel ata can only go to
45cm, Im
> <BR>
> needing the drives over the powersupply in a full tower case and that
wasnt
> <BR>
> going to reach.<BR>
> <BR>
> Also be aware that sata drives have a different power connector, so
you will
> <BR>
> need to get annoying adaptor leads for all your drives.<BR>
> <BR>
> <BR>
> [Non-text portions of this message have been removed]<BR>
> <BR>
> </tt>
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