On Fri, Jan 14, 2011 at 2:07 PM, Tracy Reed <[email protected]> wrote:
I was able to verify that it had in fact created virtual disk number 4 as a > RAID 0. However, I didn't have a file to work with in /dev representing the > disk. The operating system simply refused to see the disk so that I could > actually do something with it. I spent some time trying to figure out why > but > couldn't come up with a solution. So I called tech support.... > Later I got an email explaining that he had the > solution: I needed to run partprobe. That command finds partitions. You > can't > find partitions on disks which you can't see. Way off the mark. Eventually > it > became more convenient to reboot the server. So that is what I did and the > disks appeared. Problem solved, sort of. Although with this hot swap stuff > it > really should be possible to add disks on the fly. I've had a similar problem twice before. Once I had to use mknod to create the device in /dev before I could access it. Another time the OS was simply unaware of the new disk, and by googling I found I could do: echo "scsi scan-new-devices" > /proc/scsi/scsi Which found the new device. I just remembered a third time where I added a disk to a fiber channel array and the OS refused to see it, and I was able to use modprobe to unload and reload the mptfc module, after which the new disk was recognized.
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