At Sun, 08 Oct 2017 17:58:10 +0800, Kai Hendry wrote: > > 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
These messages are harmless. Qu is tuckling on this problem. > > 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? Please let me clarify what you said. Do you worry about losing filesystem data in removed device, in this case /dev/sdc1? To be more specific, if /mnt/raid1/file is in /dev/sdc1 and lose this file by removing this device? If so, don't worry. When removing /dev/sdc1, the filesystem data exists in this device is moved to other devices, /dev/sdb1, /dev/sdd1, or /dev/sde1. Just FYI, `btrfs replace /dev/sdc1 /dev/sdd1 /mnt/raid1` is more suitable in your case. > > > 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). Because all data in /dev/sdc1, in this case totally 1.81TiB(data) + 6.00GiB(metadata) + 32MiB(system) should be moved to remaining devices. > > > 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? Probably `btrfs device remove missing /mnt/raid1` works. Thanks, Satoru > > 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 -- 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
