Re: One failed raid device can't umount automatically

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Hi all

Any good suggestion for this problem?

Regards
Xiao

On 01/12/2021 04:42 PM, Xiao Ni wrote:
Hi all

We support to umount one failed raid device automatically. But it can't work now. For example, one 3 disks raid5 device /dev/md0. I unplug two disks one by one.
The udev rule udev-md-raid-assembly.rules is triggered when unplug disk.

In this udev rule, it calls `mdadm -If $disk` when unplug one disk. Function IncrementalRemove is called. When the raid doesn't have enough disks to be active, it tries to stop the array.
Before stopping the array, it tries to umount the raid device first.

Now it uses udisks to umount raid device. I printed logs during test. It gives error message "Permission denied". Then I tried with umount directly, it failed with the same error message.

diff --git a/Incremental.c b/Incremental.c
index e849bdd..96ba234 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -1620,6 +1620,7 @@ static void run_udisks(char *arg1, char *arg2)
                manage_fork_fds(1);
                execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL);
                execl("/bin/udisks", "udisks", arg1, arg2, NULL);
+               execl("/usr/bin/umount", "umount", arg2, NULL);
                exit(1);
        }
        while (pid > 0 && wait(&status) != pid)

Does anyone know how to fix this problem?

Regards
Xiao





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