Am 20.11.2015 um 18:08 schrieb [email protected]:
I have a script that creates a partition (using pyparted) and then tries to format it (using mkfs.ext4). Most of the time this works OK. However, sometimes the format fails because it can't find the device. There seems to be a race condition due to a delay between creating a partition and the device node in /dev being created. Is there a tool in udev or udevadm that can help my script know when it safe to proceed?
just call "partprobe" for that device, that works even when you clone MBR including partition table with dd
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[root@srv-rhsoft:~]$ cat /scripts/raid-recovery.sh
#!/usr/bin/bash
GOOD_DISK="/dev/sda"
BAD_DISK="/dev/sdb"
# --------------------------------------------------------------------------
echo "NOT NOW"
exit
# --------------------------------------------------------------------------
# clone MBR
dd if=$GOOD_DISK of=$BAD_DISK bs=512 count=1
# force OS to read partition tables
partprobe $BAD_DISK
# start RAID recovery
mdadm /dev/md0 --add ${BAD_DISK}1
mdadm /dev/md1 --add ${BAD_DISK}3
mdadm /dev/md2 --add ${BAD_DISK}2
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