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
On 10/26/2015 08:23 AM, m.roth@5-cent.us wrote:
We've got a new RAID (a JetStor), and are trying to plug it in.
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?
Gordon Messmer wrote:
On 10/26/2015 08:23 AM, m.roth@5-cent.us wrote:
We've got a new RAID (a JetStor), and are trying to plug it in.
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?
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
On 10/26/2015 10:11 AM, m.roth@5-cent.us 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.
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.
On 10/26/2015 10:11 AM, m.roth@5-cent.us 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.
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.
On 10/26/2015 8:23 AM, m.roth@5-cent.us wrote:
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?
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 -
John R Pierce -
m.roth＠5-cent.us