[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [linux-lvm] SAN Storage/mirror/lvm



I setup a similar system on a HDS-9570 but with only one
card in each machine - 'assuming' that the failover in the
driver would cope if a controller on the HDS failed (as
opposed to a QLogic failure)

This worked fine if I disconncected a path in the fabric but
when we took a controller of line the failover failed.

Since then I have used md multipath which has tested fine

On Fri, Jul 23, 2004 at 10:52:45AM +0200, Thomas Meller wrote:
> Maybe everything is all right with what I am doing - maybe not.
> 
> I have heard roumors that my setup may cause troubles.
> Does anybody know something about it?
> 
> I try to set up a cluster on a SAN with shared disks, mirrored over 2 storage controllers.
> 
> Using QLogic HBAs, I have set
> ql2xfailover=1
> to use the multipathing feature.
> 
> We have 2 separate fabrics to connect to the storage and 2 HBAs in each machine.
> 
> Disk layout:
> 
> A           B   (controllers)
> sda        sdf
> sdb        sdg
> sdc mirror sdh -+
> sdd mirror sdi  |
> sde mirror sdj -+
>                 |
>                 +-- volume group
> 
> Also, we do not have much write thruput to the disks.
> I use reiserfs because I could resize it w/o remounting.
> 
> Austin Gonyou has written something about write cache mirroring - what is that?
> Necessary?
> Howto?
> I use LVM1
> 
> Am I in danger?
> 
> Thanks
> 
> Thomas
> 
> -- 
> Thomas Meller
> mailto: thomas meller t-systems ch
> mailto: thomas meller gmx net
> ----
> ...Our continuing mission: To seek out knowledge of C, to explore strange
> UNIX commands, and to boldly code where no man page has ever been seen
> _______________________________________________
> linux-lvm mailing list
> linux-lvm redhat com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 
Franc Carter     Ph:61-2-9236-9127      Fax: 61-2-9321-5988
Systems Manager, SIRCA Ltd              http://www.sirca.org.au/

DISCLAIMER: The contents of this email, inclusive of attachments, may
be legally privileged and confidential. Any unauthorised use of the
contents is expressly prohibited. If you have received this message in
error or are not the intended recipient, you should destroy the email
message along with any attachment(s).  Unintended recipients of this
email are prohibited from retaining, disclosing, distributing or using
any information contained herein.  This email is also subject to
copyright. No part of it should be reproduced, adapted or transmitted
without the written consent of the copyright owner.

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]