Enabling AHCI causes random hard drive assignment

Issues related to hardware problems
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raphk
Posts: 7
Joined: 2011/07/24 21:00:07

Enabling AHCI causes random hard drive assignment

Post by raphk » 2011/07/24 21:39:05

Hi Everyone -
Having an interesting issue where if AHCI is enabled in the bios for SATA ports, every time the system is rebooted, new /dev/sd[b]X[/b] letters are assigned randomly. So my /dev/sda may be /dev/sdg next time i reboot, and changes again at EVERY reboot.

The motherboard is a PK5-E (Intel ICH9R), with drives plugged into the on board SATA & to a PCI-express 4 port. Any thoughts?

gerald_clark
Posts: 10642
Joined: 2005/08/05 15:19:54
Location: Northern Illinois, USA

Enabling AHCI causes random hard drive assignment

Post by gerald_clark » 2011/07/25 13:30:31

Welcome to CentOS.
New users need to read:
http://www.centos.org/modules/newbb/viewforum.php?forum=47

Use filesystem labels or UUIDs.

raphk
Posts: 7
Joined: 2011/07/24 21:00:07

Re: Enabling AHCI causes random hard drive assignment

Post by raphk » 2011/07/26 14:16:30

Thank you for the reply - I was more wondering why this is happening, and how to stop it. The drives are not being moved from sata port to sata port - doesn't seem right. but thanks again!

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