Hi there, My /mnt/raid1 suddenly became full somewhat expectedly, so I bought 2 new USB 4TB hard drives (one WD, one Seagate) to upgrade to.
After adding sde and sdd I started to see errors in dmesg [2]. https://s.natalian.org/2017-10-07/raid1-newdisks.txt [2] https://s.natalian.org/2017-10-07/btrfs-errors.txt I assumed it had to perhaps with the USB bus on my NUC5CPYB being maxed out, and to expedite the sync, I tried to remove one of the older 2TB sdc1. However the load went crazy and my system went completely unstable. I shutdown the machine and after an hour I hard powered it down since it seemed to hang (it's headless). Sidenote: I've since learnt that removing a drive actually deletes the contents of the drive? I don't want that. I was hoping to put that drive into cold storage. How do I remove a drive without losing data from a RAID1 configuration? After a reboot it failed, namely because "nofail" wasn't in my fstab and systemd is pedantic by default. After managing to get it booting into my system without /mnt/raid1 I faced these "open ctree failed" issues. After running btrfs check on all the drives and getting nowhere, I decided to unplug the new drives and I discovered that when I take out the new 4TB WD drive, I could mount it with -o degraded. dmesg errors with the WD include "My Passport" Wrong diagnostic page; asked for 1 got 8 "Failed to get diagnostic page 0xffffffea" which raised my suspicions. The model number btw is WDBYFT0040BYI-WESN Anyway, I'm back up and running with 2x2TB (one of them didn't finish removing, I don't know which) & 1x4TB. [1] https://s.natalian.org/2017-10-08/usb-btrfs.txt I've decided to send the WD back for a refund. I've decided I want keep the 2x2TB and RAID1 with the new 1x4TB disk. So 4TB total. btrfs complains now of "Some devices missing" [1]. How do I fix this situation? Any tips how to name this individual disks? hdparm -I isn't a lot to go on. [hendry@nuc ~]$ sudo hdparm -I /dev/sdb1 | grep Model Model Number: ST4000LM024-2AN17V [hendry@nuc ~]$ sudo hdparm -I /dev/sdc1 | grep Model Model Number: ST2000LM003 HN-M201RAD [hendry@nuc ~]$ sudo hdparm -I /dev/sdd1 | grep Model Model Number: ST2000LM005 HN-M201AAD Ok, thanks. Hope you can guide me, -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
