May 1, 20233 yr Dear all, i tried to remove a HDD with this https://wiki.unraid.net/Shrink_array it all went well, until i stopped the array. it got stuck in unmounting drive 7 which i removed with this method, saying unmount drive 7, drive not mounted. i read in the forum, the only way out of this loop seems to be rebotting the server. After the reboot i followed the manual again and made a new config and started the array. it got stucked in mounting the disks, as it said and told me this --------------------------------------- May 1 17:57:16 UNRAID emhttpd: shcmd (205): rmdir /mnt/disk1 May 1 17:57:16 UNRAID emhttpd: mounting /mnt/cache May 1 17:57:16 UNRAID emhttpd: shcmd (206): mkdir -p /mnt/cache May 1 17:57:16 UNRAID emhttpd: /sbin/btrfs filesystem show /dev/sdc1 2>&1 May 1 17:57:16 UNRAID emhttpd: Label: none uuid: b843e3cb-a537-434b-9212-747a404af834 May 1 17:57:16 UNRAID emhttpd: Total devices 2 FS bytes used 4.10GiB May 1 17:57:16 UNRAID emhttpd: devid 1 size 223.57GiB used 17.03GiB path /dev/sdc1 May 1 17:57:16 UNRAID emhttpd: devid 2 size 223.57GiB used 17.03GiB path /dev/sdk1 May 1 17:57:16 UNRAID kernel: emhttpd[6330]: segfault at 10f ip 0000151709d96236 sp 00001517092800c8 error 4 in libc-2.37.so[151709d0a000+169000] likely on CPU 3 (core 3, socket 0) May 1 17:57:16 UNRAID kernel: Code: 00 00 66 90 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 6a <f3> 0f 6f 20 66 0f 74 e0 66 0f d7 d4 85 d2 74 04 0f bc c2 c3 48 83 --------------------------------------- can anyone tell me, what to try?
May 1, 20233 yr Community Expert Can tell you why but you will need to reboot to make it usable again.
May 1, 20233 yr Author yes it does. i allredy tried several reboots here unraid-diagnostics-20230501-1829.zip
May 1, 20233 yr Community Expert Solution Don't start the array, click on cache, change the fs from auto to btrfs and choose the correct profile you are using, then start the array to see if that helps.
May 1, 20233 yr Author wow! Thank you! I was suspecting the cache-Drives, but i didn't know how to prove it. Where did you find the problem. And well, THANK YOU!
May 2, 20233 yr Community Expert I've seen this before, though not quite sure why it happens on very rare occasions.
May 2, 20233 yr Author While the cache isn't encrypted, could it be possible the encryption of the array has a play in it?
May 2, 20233 yr Community Expert Nope, the other server I see this has no encryption for anything, it happens every time you try to import an existing btrfs pool, like after a new config, if the pool fs is set to auto it segfaults, but I can only reproduce this with one server, and it has nothing in common that I can see with yours, so kind of a weird issue.
May 2, 20233 yr Community Expert One thing that might help, if you can, stop the array and post the output of btrfs fi show
May 2, 20233 yr Author Label: none uuid: b843e3cb-a537-434b-9212-747a404af834 Total devices 2 FS bytes used 4.12GiB devid 1 size 223.57GiB used 17.03GiB path /dev/sdb1 devid 2 size 223.57GiB used 17.03GiB path /dev/sdj1
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