As a standard and when possible I like to do raid1 just for failover or
easy recovery.
I was my first time I wanted to try the onboard HW raid controller and
all the trouble I have ran
into I gave up on it and found a true HW raid controller. I am going to
try it this morning.
If it fails I
IMHO, data protection is a MUST, and thus RAID is a MUST for QMAIL (and
other client services like web servers and the like). The question isn't
about RAID/NO-RAID, it is about WHICH RAID and HOW:
To my mind, RAID decisions come in TWO flavors:
- RAID TECHNOLOGY (e.g.: RAID-1 vs RAID-5 vs.
I never did alot with RAIDs, but all were hardware and not one ever
worked as advertised for recovery. I prefer a solid mirrored
backup. To each his own.
On 05/16/2012 07:59 AM, Dan McAllister wrote:
IMHO, data protection is a MUST, and thus RAID is a
I used to be a fan of ADAPTEC RAID, but TWICE I had an issue where a
RAID1 mirror recovered from the wrong disk, thus erasing TONS of data
that had to be recovered from backups (archives, to be more
language-correct). In both cases, ADAPTEC admitted that it was a flaw in
their firmware that
Let's be clear, that raid is *not* a backup solution. The purpose of
raid is to keep the system running in the event of a hard drive failure.
Sort of like a UPS does for power. You still need a backup / disaster
recovery solution above and beyond raid. I recommend off-site backups
(or archives
First, that is an excellent differentiation to make Eric -- although I
do sometimes use SOFTWARE RAID to MIRROR a hardware RAID drive set
(essentially creating a 3rd mirror) as a form of backup... not
preferred, but a valid (if expensive) way to get a point-in-time copy of
the filesystem. But
On 05/16/2012 11:54 AM, Dan McAllister wrote:
I also found it interesting, Eric, how I'm willing to pay for the HW
controller, but do NOT use RAID on my backup location, while you prefer
to save on the HW controller but spend on the redundancy in the backup
storage! Different histories create
Ok,
So I did go with the 3ware-8006-2lp card and no issues yet..
I do prefer HW raid if it is at my disposal but its been a while since I
have had to deal with this.
I do remember about firmware or onboard raid was fake but did not dawn
on me till I had the
update issue. Went back and
Ok, I was doing some more comparison and experimentation on this machine
I want to work with HW raid.
here is what I get when I run this
[root@localhost ~]# blkid | sort
/dev/hda: LABEL=CentQMT5-1.2.1 TYPE=iso9660
/dev/sda1: LABEL=/boot UUID=16efa862-46f7-4d34-b2e0-a2a7c8df9a3f
TYPE=ext3
Here is what fstab has in it..
These are all snapshots before I do the upgrade
LABEL=/1/ ext3defaults1 1
LABEL=/boot /boot ext3defaults1 2
tmpfs /dev/shmtmpfs defaults0 0
Ok, here is the device.map file in grub..
# this device map was generated by anaconda
(hd0) /dev/mapper/isw_ddfebjifef_RAID_Volume0
On 05/14/2012 11:37 AM, David wrote:
Here is what the default image installs before an update and it will
reboot with no issue.
# grub.conf generated by
Ok, here is the only file I find that has changed grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
#
IIRC, HW raid should not be showing the individual drives to linux. They
should appear as a single device. I would check the raid card
configuration. Did the battery on it die or something?
Are you using a 'real' raid card, or raid on the MB? Raid on the MB is
fake-raid, and you should steer
Yes it is raid on the motherboard ie Intel application controller.
Well, How do I get Jakes Iso to let me configure software raid?
I does everything so autonomously that I do not see where or how to do that.
Thanks
Dave
On 05/15/2012 12:30 PM, Eric Shubert wrote:
IIRC, HW raid should not be
I don't know off hand. http://wiki.qmailtoaster.com/index.php/QMT-ISO
says that there's an advanced option, which will allow you to specify
the drive configuration. This is where you would defined the raid
partitions and arrays.
--
-Eric 'shubes'
On 05/15/2012 01:43 PM, David wrote:
Yes it
I found it right after I posted ... FACE PALM:)
I also dug up a 3ware true HW raid card to give a whirl and see what
happens.
thanks
Dave
On 5/15/2012 4:56 PM, Eric Shubert wrote:
I don't know off hand. http://wiki.qmailtoaster.com/index.php/QMT-ISO
says that there's an advanced option, which
FWIW, stay away from raid-5 if at all possible. Raid-1 is best, raid-10 ok.
--
-Eric 'shubes'
On 05/15/2012 07:42 PM, David Milholen wrote:
I found it right after I posted ... FACE PALM:)
I also dug up a 3ware true HW raid card to give a whirl and see what
happens.
thanks
Dave
On 5/15/2012
Here is what is in the menu.lst after the yum update:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
#
Here is what the default image installs before an update and it will
reboot with no issue.
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are
On 05/12/2012 08:58 PM, David Milholen wrote:
I am trying to do a yum update on a new install of QMT-ISO5-1.2 that I
got from Jakes site.
Only thing is when I do. The server will not boot the new kernel .
It boots into Grub and a prompt and thats it.
The server is running Hardware Raid.
Any
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