Valeri Galtsev wrote: > On Fri, March 25, 2016 10:45 am, m.roth at 5-cent.us wrote: >> 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, <snip> >> 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). > > Then we will need real expert to chime in on this... Yeah, I was wondering about, what, dbus? dracut? <snip> >> As I said, I expected the scsi-rescan-bus to clear it up, but though it >> saw it, nothing changed. > > Did you do scsi-rescan-bus after you disconnected the device, and then > again after you connected it back? I'm just shooting in a dark, but the No. I didn't think of doing that, because I thought that once I'd shut the RAID controller down, and powered it off, the system would have noticed. > first one probably will remove the device that disappeared, and the second > will add the device back. And it may do nothing about devices that exist That might have worked; certainly, it's a thought to keep in mind for the future (he says, pushing it onto the stack). <snip> mark