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January 28, 2017 at 10:26 PM
isi_reformat_node *will* reformat the disks. If you need a multi-pass wipe, there are no built-in tools for this on Isilon. You can however pay for Blanco...
January 27, 2017 at 4:38 PM
I had to do something similar once before. isi_reformat_node will not scrub the drives. I suggest taking a look at the isi_ovt_check script and the tools in /usr/bin/isi_hwtools.
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After the node was evicted from the cluster and rebooted back to the wizard I hit Ctrl-C to break out.
I then started a screen since I only had console access. This way once the process was running I could do other things if needed. I then change directories to /var/crash and made sure it was clean. I did this to prevent the log directory from getting created somewhere else and filling up / or some other file system while the process was running. I then ran the test command.
This come back with a message about messing things up and unmounting /ifs and then killing a bunch of processes which I would then kill. I would then kick it off again and the scrub would start. It would create a directory to log progress to and seems like it was writing data to all the drives.
At the end of a pass in the log file for each drive was this summary.
#exit:
end da2s1e: 38629.1 secs, 24.6652 MB/s
#exit: preread write read compare
#exit: Total Bytes: 0 999074796032 0 0
#exit: Scrub Bytes: 0 0 0 0
#exit: preread write read compare ecc
#exit: Total Errs: 0 0 0 0 0
#exit: Scrub Errs: 0 0 0 0 0
#stat: summary: pass
Given that the –X option runs the test in destructive mode, the –W tells it to do writes only, and the summary indicated it didn’t do any pre-reads, I believe I can safely assume that this process wrote garbage to the entire partition which contained IFS thus the drive has been wiped. The default options also appear to do 2 passes.
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