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Full Discussion: Storage from SAN
Top Forums UNIX for Dummies Questions & Answers Storage from SAN Post 302472155 by kopper on Tuesday 16th of November 2010 12:06:53 PM
Old 11-16-2010
Storage from SAN

hi guys

I installed Centos 5.5 (local disk). I am using 2 HBAs
Now I mapped 5 LUNs from a Storage.
I will be using LVM

just to test I assigned a LUN I've read I have to use multipath to avoid my Centos see the LUN twice

I enabled mdmpd and multipathd...

something else I should do?



by the way I added this LUN 5G but when I boot the server I get these errors those are about sdb BUT when I showed the LUN to the server
fdisk -l only showed me /dev/sdc ???? is the multipathd working?

HTML Code:
end_request: I/O error, dev sdb, sector 0
Buffer I/O error on device sdb, logical block 0
Buffer I/O error on device sdb, logical block 1
Buffer I/O error on device sdb, logical block 2
Buffer I/O error on device sdb, logical block 3
end_request: I/O error, dev sdb, sector 0
Buffer I/O error on device sdb, logical block 0
end_request: I/O error, dev sdb, sector 10485752
Buffer I/O error on device sdb, logical block 1310719
end_request: I/O error, dev sdb, sector 10485752
Buffer I/O error on device sdb, logical block 1310719
end_request:

thanks a lot

Last edited by kopper; 11-16-2010 at 01:53 PM..
 

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DBIx::Class::Storage::DBI::Replicated::Replicant(3)	User Contributed Perl Documentation    DBIx::Class::Storage::DBI::Replicated::Replicant(3)

NAME
DBIx::Class::Storage::DBI::Replicated::Replicant - A replicated DBI Storage Role SYNOPSIS
This class is used internally by DBIx::Class::Storage::DBI::Replicated. DESCRIPTION
Replicants are DBI Storages that follow a master DBI Storage. Typically this is accomplished via an external replication system. Please see the documents for DBIx::Class::Storage::DBI::Replicated for more details. This class exists to define methods of a DBI Storage that only make sense when it's a classic 'slave' in a pool of slave databases which replicate from a given master database. ATTRIBUTES
This class defines the following attributes. active This is a boolean which allows you to programmatically activate or deactivate a replicant from the pool. This way you can do stuff like disallow a replicant when it gets too far behind the master, if it stops replicating, etc. This attribute DOES NOT reflect a replicant's internal status, i.e. if it is properly replicating from a master and has not fallen too many seconds behind a reliability threshold. For that, use "is_replicating" and "lag_behind_master". Since the implementation of those functions database specific (and not all DBIC supported DBs support replication) you should refer your database-specific storage driver for more information. master Reference to the master Storage. METHODS
This class defines the following methods. debugobj Override the debugobj method to redirect this method call back to the master. ALSO SEE
<http://en.wikipedia.org/wiki/Replicant>, DBIx::Class::Storage::DBI::Replicated AUTHOR
John Napiorkowski <john.napiorkowski@takkle.com> LICENSE
You may distribute this code under the same terms as Perl itself. perl v5.16.2 2011-05-23 DBIx::Class::Storage::DBI::Replicated::Replicant(3)
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