redhatdude@xxxxxxxxxxxxx wrote:
-------------- Original message ----------------------
From: redhatdude@xxxxxxxxxxxxx
-------------- Original message ----------------------
From: Bill Davidsen <davidsen@xxxxxxx>
redhatdude@xxxxxxxxxxxxx wrote:
Hi,
When creating a RAID 1 in F9.
Does it make sense to make the /boot partition on both discs a RAID too?
I have /boot and / as RAID 1 (dm-0 and dm-1). If I disconnect one of the
drives, the computer freezes. Isn't the RAID supposed to keep it running?
I'm really new to this, so any help is appreciated.
Are you sure /boot is on a raid partition, and not on a dm pseudo
device? If you created a partition on your drives, made a raid-1 of the
two partitions (100-200MB is good), and then did whatever with the rest
of your disk, you should be fine.
If you made one huge raid array and used dm to break it up, you are not
fine. Do "cat /proc/mdstat" and see that there is a small raid-1 for
boot, and "df" to check that /dev/mdX is mounted on /boot. If that's the
case you should be good, otherwise you probably don't boot off one drive.
NOTE: your BIOS may not boot off the 2nd drive if the 1st drive is
present and has data errors, should if the 1st drive is dead. Some BIOS
do, some don't.
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
This is the output of df.
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md1 470535632 3951984 442681744 1% /
/dev/md0 99099 12499 81484 14% /boot
tmpfs 2032168 48 2032120 1% /dev/shm
And this is the output of cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md0 : active raid1 sdb1[1] sda1[0]
102336 blocks [2/2] [UU]
md1 : active raid1 sda3[0] sdb3[1]
478038080 blocks [2/2] [UU]
unused devices: <none>
I have two drives with /boot and /
If I unplug the first one, the system remains up and running. If I however
unplug the second one, the system becomes unstable, X crashes, and eventually
the system becomes irresponsive.
Why does this happen with one disk only?
Thanks,
EJ
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To answer my own question.
The problem is that the swap partition is only on one disk and it's not RAIDed. So when I unplug the drive with the swap partition, the system goes down.
The next step would be to create a RAID for swap and make the system use it.
EJ
Good catch, just for completeness, using a raid 10,f2 swap seems
fastest, but the last Fedora recovery CD I tried didn't start it the way
it does raid-1. I didn't need it, and could start it by hand, but if you
have a low memory system it could be an issue.
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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