February 8, 20206 yr I'm running 6.8.1 with a 3-drive raid1 cache pool. I've been getting Errors on Cache Pool messages, and many of the following in the logs: BTRFS error (device sdf1): error writing primary super block to device 1 kernel: sd 7:0:0:0: [sdf] tag#15 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00 kernel: sd 7:0:0:0: [sdf] tag#15 CDB: opcode=0x2a 2a 00 1d 9b af c0 00 00 58 00 The device still shows a green ball on the Main tab, but smartctl returns Short INQUIRY response, skip product id A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. I'm assuming that the drive needs replacement. My only use of cache is VM's and Dockers, and I have disabled both services, as well as temporarily disabling the mover job. I would like to remove the cache pool from the configuration until I can obtain a replacement. I assume that the procedure is to stop the array and unassign all of the cache drives, and start the array. Then when the new drive arrives, reassign the 2 good drives and the replacement, and start the array. Please confirm my procedure. I only have remote access to the server for the next few days. Thanks tower7-diagnostics-20200208-1324B.zip
February 9, 20206 yr Community Expert Cache1 dropped offline: Feb 7 10:24:38 Tower7 kernel: ata6: hard resetting link Feb 7 10:24:43 Tower7 kernel: ata6: link is slow to respond, please be patient (ready=0) Feb 7 10:24:48 Tower7 kernel: ata6: COMRESET failed (errno=-16) Feb 7 10:24:48 Tower7 kernel: ata6: hard resetting link Feb 7 10:24:53 Tower7 kernel: ata6: link is slow to respond, please be patient (ready=0) Feb 7 10:24:58 Tower7 kernel: ata6: COMRESET failed (errno=-16) Feb 7 10:24:58 Tower7 kernel: ata6: hard resetting link Feb 7 10:25:03 Tower7 kernel: ata6: link is slow to respond, please be patient (ready=0) Feb 7 10:25:33 Tower7 kernel: ata6: COMRESET failed (errno=-16) Feb 7 10:25:33 Tower7 kernel: ata6: limiting SATA link speed to 3.0 Gbps Feb 7 10:25:33 Tower7 kernel: ata6: hard resetting link Feb 7 10:25:38 Tower7 kernel: ata6: COMRESET failed (errno=-16) Feb 7 10:25:38 Tower7 kernel: ata6: reset failed, giving up Feb 7 10:25:38 Tower7 kernel: ata6.00: disabled Likely a cable/connection issue, see here for more info: https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=700582
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