Semi-OT: HW
Running CentOS 6.7, on an older HP DL580 G5. We’ve got a Dell 12-bay RAID
box plugged into a PERC H800 (aka LSI Liberator) that we put in the HP, and that works fine. We’ve got a new RAID (a JetStor), and are trying to plug it in.
The layout is that the Dell RAID is dual-pathed DAS. Each PERC has two DAS
ports. We’ve got the Dell RAID in the top port of each PERC. I *thought* I
could just plug the new RAID, which also has two ports, into the bottom two ports on the PERC.
TRied rescanning the SCSI bus, /sys/class/scsi_host/host[0-5]/scan, with no apparent sight of the new RAID. Can I do this the way I’ve got it, or do I need to daisy-chain the new RAID through the old RAID?
mark
5 thoughts on - Semi-OT: HW
When you asked about this three weeks ago, you didn’t answer questions about the model of JetStor product, and the conversation died there.
Could you provide that?
The H800 is a MegaRaid based controller, with dell proprietary firmware.
the Dell ’12 bay RAID box’, does that actually have its own embedded raid controller, or is it just a 12 drive SAS jbod box? I’d expect the latter, as you don’t plug a raid into a raid card.
the jetstor, same question, does that have its own raid or is it also JBOD ?
Gordon Messmer wrote:
I thought I had (unless it bounced, thanks to nixspam, and I never reposted). It’s a JetStor 712s. It *should* appear as a single huge drive.
mark
yeah, that won’t work behind a hardware raid controller, you should get a plain SAS HBA card, like a HP H222, or LSI 9211 flashed in IT mode, or whatever, for that.
I’d suggest asking JetStor tech support to confirm compatibility with your controller. They don’t have a manual online for that model enclosure, oddly, but they generally do describe Linux compatibility. I
suspect that John is correct, that it isn’t compatible with your controller.