Subject: ATA errors with Fedora 23 Kexec

From: Adi Gangidi <[email-masked]>
Date: Thu, 21 Apr 2016 08:07:11 +0000

Hi All

At Rackspace, we are working with our Barreleye servers that runs a Fedora 23 Live Hypervisor. We usually do NOT hit any issues with the mSATA device during bootup / Kexec from Petitboot.

But with Fedora 23 OS, we noticed an issue we are hitting, while we kexec from Fedora 23 Live Instance  into an updated Live instance. I wanted to bring this to your notice a?nd see if guys have ever run into something similar. During the kexec process, we see  errors on ATA driver resulting in failed initialization of mircron mSATA device. Ultimately the kexec process fails.

Attached is a boot log after kexec.  Please look into this. We'd like to know what you guys think.

Here is lshw for micron:
/0/a1/0.0.0       /dev/sdb   disk       256GB Micron_M600_MTFD

Does kexec command in Petitboot automatically unmount / power cycle all devices ? Is there something different that Petitboot does when kexec command is issued compared with other OS

?Best
Adi