Adaptec/Microsemi support recommends to replace the RAID card for ubuntu 18.04..
Answer from support: Unfortunately, this card has no drivers for Ubunto 18. See it's product page here https://storage.microsemi.com/en-us/support/raid/sas_raid/sas-6405e/ Replacement card is https://storage.microsemi.com/en-us/support/raid/sas_raid/asr-8405e/ which contains driver availability for Ubuntu 18. -- 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