Valeri Galtsev wrote: > > On Fri, March 25, 2016 9:55 am, m.roth at 5-cent.us wrote: >> I don't think I've seen this with CentOS 6 or 5, but I had to repair an >> external RAID box this morning. The server, running CentOS 7, has an >> LSI HBA card in it, and it's presented to the system as /dev/sdb. >> I shut off the RAID controller, powered it off, > > You did unmount filesystem on the machine before that, right? Of course! > >> did the repair, then plugged everything back in (that includes the two >> fiber cables and the ethernet), and brought the RAID back up. I even >> used its web page to restart the controller (in the RAID box. >> >> I couldn't remount the drive until I rebooted the server. > > Before powering off/disconnecting RAID box, did you remove resembling SCSI > device? this is done if my memory doesn't fail me by doing this: > > echo 1 > /sys/class/scsi_device/6:0:0:0/device/delete No - I've never done that. With hot-swap drive bays, the system sees it going out, and says so, and then the drive goes away, or becomes inactive... but when I shove one back in, it sees it, though it may make it as /dev/sd[letter+1] (that is, if it had been /dev/sdb, it's now /dev/sdc). > > (replace "6:0:0:0" with your device's address). If you didn't remove the > device before powering it off, I'm not surprised. If you did remove the > device before powering it off, I'm puzzled ;-) As I said, I expected the scsi-rescan-bus to clear it up, but though it saw it, nothing changed. <snip> mark