>>>Why do you want that? There are nice cases available.
>>Well, think about db server upgrade for example. If db server and RAID HDs are
>>in different boxes then you have a lot more flexibility when it comes to how you
>>do the upgrade. You may build a totally new db server box and then connect the
>>RAID storage to it. If it something does not go as planned you can always
>>connect RAID back to the old db server.
> If you want physical separation, then SATA is probably not your answer...
> LVD SCSI, with it's 3m cable length, would probably be more appropriate. I
Actually, the 3m cable length applied to pre-LVD SCSI busses. With LVD
you can use up to 12m cables.
Quote:> don't think that the cost for setting up SCSI vs. SATA should be that
> different. I configured a setup such as that which you describe... I put
> the 6 Ultra160 drives into an old PC enclosure with 350W power supply and
> connected it to my linux server and used s/w RAID to set up a 5-drive RAID-5
> array with one hot spare. I bought the lot of 6 36Gb drives off of eBay for
> $200, the card (also eBay) was $45. Ribbon cable was $65, hard to find with
> enough connectors...
If you need large amounts of storage, the equation changes dramatically
in favour of using SATA drives. Compare the price of a 146GB SCSI drive
to the price of, say, a 200GB SATA drive. Around here the SCSI drive is
about 4 times the price of the SATA drive. (Also, in many business
environments, buying unsupported gear from E-Bay simply isn't viable.)
Some high-end external RAID enclosures use LVD SCSI (or FibreChannel)
for connection to the host system and SATA for the drives. Those
enclosures are *very* expensive, though, as they must include the RAID
controller (plus some sort of configuration interface for the RAID) as
well as the circuitry for the SATA drives and the SCSI host connection.
(See, for example, the NexSan ATABoy series.)
AIUI, the OP was looking to duplicate such an item: an external RAID
box using low-cost SATA drives. Without the SCSI-to-SATA RAID
controller found in those boxes, a do-it-yourself solution just isn't