Bug#351606: multipath mis-detects SATA raid1 by default

[Michael Shuey]

On Tuesday 07 February 2006 11:19, Bastian Blank wrote:
> On Sun, Feb 05, 2006 at 09:35:29PM -0500, Michael Shuey wrote:
> > On bootup, multipath correctly handles my FC-based SAN.  However, it
> > also detects the two SATA drives in the system.  Since the two drives
> > are in a raid1, are physically identical, and represented by SCSI block
> > devices (/dev/sd*), multipath always assumes these are a single drive
> > with two valid paths, and creates a new multipath group.
>
> Which name does multipath use for them?
> Do they have the same serial number?

The SATA disks get put in a multipath named 
"0ATA_ST3160827AS_Linux_ATA-SCSI_simulator".  I'm not entirely sure how to 
check their serial numbers, since their path name isn't their serial number 
(as appears to be the case with my FC disks).

Let me know if there's something you'd like me to dig out of sysfs.

-- 
Mike Shuey