Hi Arch is occasionally - only occasionally - very slow to start up. After examining the dmesg log, I see errors like 100.740566] blk_update_request: I/O error, dev sda, sector 119400712 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 0 [ 100.740584] ata1: EH complete [ 101.100769] audit: type=1130 audit(1622446429.249:86): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=upower comm="systemd" ex e="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [ 101.180724] ata1.00: exception Emask 0x0 SAct 0x40 SErr 0x0 action 0x6 [ 101.180730] ata1.00: irq_stat 0x40000008 [ 101.180733] ata1.00: failed command: READ FPDMA QUEUED [ 101.180735] ata1.00: cmd 60/70:30:f8:37:1e/00:00:07:00:00/40 tag 6 ncq dma 57344 in res 41/84:70:fc:37:1e/00:00:07:00:00/00 Emask 0x410 (ATA bus error) <F> [ 101.180742] ata1.00: status: { DRDY ERR } [ 101.180743] ata1.00: error: { ICRC ABRT } [ 101.180747] ata1: hard resetting link [ 101.488857] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 101.594776] ata1.00: configured for UDMA/66 [ 101.594806] sd 0:0:0:0: [sda] tag#6 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s [ 101.594811] sd 0:0:0:0: [sda] tag#6 Sense Key : Aborted Command [current] [ 101.594816] sd 0:0:0:0: [sda] tag#6 Add. Sense: Scsi parity error [ 101.594819] sd 0:0:0:0: [sda] tag#6 CDB: Read(10) 28 00 07 1e 37 f8 00 00 70 00 [ 101.594821] blk_update_request: I/O error, dev sda, sector 119420920 op 0x0:(READ) flags 0x80700 phys_seg 10 prio class 0 [ 101.594844] ata1: EH complete [ 101.870769] ata1.00: exception Emask 0x0 SAct 0x3c SErr 0x0 action 0x6 [ 101.870775] ata1.00: irq_stat 0x40000008 [ 101.870778] ata1.00: failed command: READ FPDMA QUEUED [ 101.870780] ata1.00: cmd 60/b8:18:c0:62:89/00:00:07:00:00/40 tag 3 ncq dma 94208 in res 41/84:b8:48:63:89/00:00:07:00:00/00 Emask 0x410 (ATA bus error) <F> [ 101.870787] ata1.00: status: { DRDY ERR } [ 101.870789] ata1.00: error: { ICRC ABRT } This suggests a hard drive that should be replaced, but badblocks reports that there are absolutely zero bad sectors or other errors on the hard drive. And the fact that the problem is intermittent also suggests that it may perhaps be a kernel issue rather than a hard drive issue? It is not a very critical machine and I have backups. Do you have some suggestions as to how I should go about dealing with this? Other commands to test the hard drive? Kernel parameters? Anything? ~/ % uname -a Linux gatsby 5.12.7-zen1-1-zen #1 ZEN SMP PREEMPT Wed, 26 May 2021 22:03:55 +0000 x86_64 GNU/Linux Thanks, Morten