I also have this issue after upgrading to 18.04.2 LTS with a host with an Adaptec 5805 and linux-image-4.15.0-46-generic.
Machine hangs on boots and starts returning aacraid: Host Adapter abort request. aacraid: Outstanding commands on (0,2,223,0): aacraid: Host Adapter abort request. aacraid: Outstanding commands on (0,2,224,0): aacraid: Host Adapter abort request. aacraid: Outstanding commands on (0,2,225,0): etc First I upgraded the FW on the controller to 19204 (from 19176) no improvement Rolled back to linux-image-4.15.0-45-generic no change. I tried mainline kernels linux-image-unsigned-5.0.0-050000-generic_5.0.0-050000.201903032031_amd64.deb and linux-image-unsigned-4.20.14-042014-generic_4.20.14-042014.201903051334_amd64.deb and issue persisted But if i roll back to 4.4.0-142-generic no problems. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1777586 Title: Ubuntu Server 18.04 LTS aacraid error Status in linux package in Ubuntu: Confirmed Status in linux source package in Bionic: Confirmed Bug description: I upgraded from a previous version of Ubuntu 14.04LTS to 18.04LTS and am now running into these raid adapter driver errors. The server ran fine in older version. My apologies as I lost the exact version, but it never had any errors like this version. Now when ever I try to copy files to the RAID 5 drive, or untar a file, I get these errors now after a few MB's of written data. Linux batboat 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux batboat:/var/log$ lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 I have tried the IRQ debugging tips to no avail. I loaded in Debian9.4.0 and it only briefly showed this error once. But appears to be much more resilient and appears to work fine. Jun 19 00:02:21 batboat kernel: [ 498.770839] aacraid: Host adapter reset request. SCSI hang ? Jun 19 00:02:37 batboat kernel: [ 514.139167] aacraid: Host adapter reset request. SCSI hang ? Jun 19 00:02:37 batboat kernel: [ 514.795083] aacraid 0000:03:09.0: Adapter health - 199 Jun 19 00:02:37 batboat kernel: [ 514.800376] aacraid 0000:03:09.0: outstanding cmd: midlevel-0 Jun 19 00:02:37 batboat kernel: [ 514.800378] aacraid 0000:03:09.0: outstanding cmd: lowlevel-0 Jun 19 00:02:37 batboat kernel: [ 514.800381] aacraid 0000:03:09.0: outstanding cmd: error handler-0 Jun 19 00:02:37 batboat kernel: [ 514.800383] aacraid 0000:03:09.0: outstanding cmd: firmware-5 Jun 19 00:02:37 batboat kernel: [ 514.800385] aacraid 0000:03:09.0: outstanding cmd: kernel-0 Jun 19 00:02:37 batboat kernel: [ 514.800391] sd 4:0:0:0: Device offlined - not ready after error recovery Jun 19 00:02:37 batboat kernel: [ 514.800394] sd 4:0:0:0: Device offlined - not ready after error recovery Jun 19 00:02:37 batboat kernel: [ 514.800396] sd 4:0:0:0: Device offlined - not ready after error recovery Jun 19 00:02:37 batboat kernel: [ 514.800399] sd 4:0:0:0: Device offlined - not ready after error recovery Jun 19 00:02:37 batboat kernel: [ 514.800401] sd 4:0:0:0: Device offlined - not ready after error recovery To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777586/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp