February 10Feb 10 I have a 5x12tb drives + 1 parity. Today I logged into my NAS to find the following alerts/errors. The drive is from 2024 and currently listing 2496 errors. Currently my array shows as "Read-Check 63.5 % • Paused" and I have the option to resumeCan someone please review the diagnostics and let me know how I should proceed? I've not done anything else since seeing the error. The drive is currently disabled and emulated. homenas-diagnostics-20260210-0258.zip
February 10Feb 10 Community Expert No SMART report for disk2. Looks like connection problem. Emulated disk2 is mounted.Check connections and post new diagnostics.
February 10Feb 10 Author When I click Start short SMART test is stops instantly.This is what is shown under SMART Selftest history and SMART error log.=== START OF READ SMART DATA SECTION === Read SMART Log Directory failed: scsi error aborted command Read SMART Error Log failed: scsi error aborted commandHere's the downloaded smart report. I'm unsure how to check connections as you suggested? ST12000NM0008-2H3101_20260210-1354.txt Edited February 10Feb 10 by killian
February 10Feb 10 Community Expert That looks like a bad disk, but it may be worth swapping cables/slots with another one to make sure it's not a cable/connection issue.
February 10Feb 10 Community Expert 1 hour ago, killian said:unsure how to check connectionsShutdown, check connections to disk, SATA and power, both ends, including splitters. Each connector must sit squarely and firmly on the connection, with enough slack in cable so it isn't pulling on the connection.
February 15Feb 15 Author On 2/10/2026 at 3:18 PM, trurl said:Shutdown, check connections to disk, SATA and power, both ends, including splitters. Each connector must sit squarely and firmly on the connection, with enough slack in cable so it isn't pulling on the connection.I've swapped the sata and power cables and rebooted. 0 errors listed but the disc is still disabled. Short smart completed without error. I've kicked of an extended now. If that's clear do you think I'm good to re-enable the disc?
February 15Feb 15 Author Hmm extended test ended out of no where, now I can't start any smart test.Log just says "Read SMART Log Directory failed: scsi error aborted command"Also got the following warnings since boot up. Reallocated is now at 216I'm guessing disc dead, check warranty?
February 15Feb 15 Author 8 minutes ago, trurl said:Post new diagnosticsST12000NM0008-2H3101-20260215-1724.txthomenas-diagnostics-20260215-1735.zip
February 16Feb 16 Community Expert Not getting a SMART report now as noted, but based on those notifications you had you should replace.Emulated disk2 is mounted so should be OK to rebuild to a new 12TB disk.https://docs.unraid.net/unraid-os/using-unraid-to/manage-storage/array/replacing-disks-in-array/#preparing-for-drive-replacement
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