Hi David, Apologies for the delay in response. It looks like the firmware failed to spin up the drives. You can try "arcconf RESCAN <Controller#>" and see if it spins up the drives. (arcconf can be downloaded from https://storage.microsemi.com/en-us/support/raid/ ) >From the description - I see you are using a Series-5(ASR-51245) controller, which was marked EOL in 2012. The last version of Ubuntu supported for this product was 11.04. Since there have been so many submissions (both kernel and driver), there could also be some compatibility issues between 11.04 and 20.01. Microchip no longer supports this product. Thanks Sagar > -----Original Message----- > From: Martin K. Petersen [mailto:martin.petersen@xxxxxxxxxx] > Sent: Monday, October 26, 2020 3:15 PM > To: David C. Partridge <david.partridge@xxxxxxxxxxxxx> > Cc: linux-scsi@xxxxxxxxxxxxxxx > Subject: Re: Adaptec ASR-51245 and aacraid driver timeouts > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the > content is safe > > David, > > > I'm running LUbuntu x64 20.04.1 kernel 5.4.0-52-generic with an > > Adapted ASR-51245 hosting a RAID-5 array. > > > > If I configure the card to power down the drives in the raid array > > after a period of idleness, the next time my server attempts to access > > the logical device I get: > > If card firmware decides to power down the drives, why doesn't it spin > them back up on access? > > -- > Martin K. Petersen Oracle Linux Engineering