xzxz1188 Posted February 24, 2020 Share Posted February 24, 2020 Hi, today I am trying to copy files into array, and when copy job is running the file system is suddenly became read-only. In system log there are lots of BTRFS errors showing up. Seems it is caused by one of my cache disk (sdd1). To avoid any data lost could you please help me what should be my next step? Thanks! tower-diagnostics-20200224-0715.zip Quote Link to comment
JorgeB Posted February 24, 2020 Share Posted February 24, 2020 Cache2 dropped offline, and your cache pool is not redundant: Feb 24 14:18:04 Tower kernel: ata3: hard resetting link Feb 24 14:18:10 Tower kernel: ata3: link is slow to respond, please be patient (ready=0) Feb 24 14:18:39 Tower kernel: ata3: COMRESET failed (errno=-16) Feb 24 14:18:39 Tower kernel: ata3: limiting SATA link speed to 3.0 Gbps Feb 24 14:18:39 Tower kernel: ata3: hard resetting link Feb 24 14:18:44 Tower kernel: ata3: COMRESET failed (errno=-16) Feb 24 14:18:44 Tower kernel: ata3: reset failed, giving up Feb 24 14:18:44 Tower kernel: ata3.00: disabled Check cables to see if it comes back online and then run a scrub. Also, even if you want to use the data in single profile you should make the metadata raid1, and see here for better pool monitoring. Quote Link to comment
xzxz1188 Posted February 25, 2020 Author Share Posted February 25, 2020 Thank you so much! Good news is that I figure out where the problem is, but the bad news... seems the problem is caused by SSD disk itself, not cables. That means I may lose this cache disk. I think I have to accept the lost (files and appdata?) on this disk. What should be my next step? If I change the cache disk, rebuild the cache pool, will it damage my array's existing data? Quote Link to comment
mlapaglia Posted February 25, 2020 Share Posted February 25, 2020 Definitely install the "CA Backup / Restore Appdata" plugin and backup your cache drive regularly! Saved me today. Quote Link to comment
xzxz1188 Posted February 25, 2020 Author Share Posted February 25, 2020 Yes after this lesson I will definitely install CA Backup / Restore app in my tower... Currently is it safe for me to directly start my array? One cache disk is gone, now I have all my array disks and cache disk1. Thanks! Quote Link to comment
JorgeB Posted February 25, 2020 Share Posted February 25, 2020 It's safe to start but cache likely won't mount and will need to be re-formatted. Quote Link to comment
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