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green_buddy
Tux's lil' helper
Joined: 08 Jan 2003
Posts: 115
Location: Bay Area, CA
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 Posted: Sun Mar 11, 2007 5:43 am Post subject: weird dmraid issue |
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So I have to say it's been quite a while since I've posted, and that's 'cause my gentoo system was happily plugging along as the raid fileserver I wanted it to be when one day suddenly... blam... the power outage corrupted my boot sector and no more raid1 mirror fileserver! Argh!!! 
Now I'm trying to reinstall the raid using dmraid. All seems to be going alright except for something kinda weird. I want to mount my reiserfs partition on /storage , but check this out...
| Code: | myhost / # fdisk /dev/mapper/hpt37x_dcicceigbb
The number of cylinders for this disk is set to 155060.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): p
Disk /dev/mapper/hpt37x_dcicceigbb: 80.0 GB, 80026356224 bytes
16 heads, 63 sectors/track, 155060 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/mapper/hpt37x_dcicceigbb1 * 1 63 31720+ 83 Linux
/dev/mapper/hpt37x_dcicceigbb2 64 3040 1500408 82 Linux swap / Solaris
/dev/mapper/hpt37x_dcicceigbb3 3041 155061 76618584 83 Linux
Command (m for help): q
myhost / #
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All fine and dandy there right? No problems so far! I'd really like to mount /dev/mapper/hpt37x_dcicceigbb3 on /storage. Shouldn't be that big of a deal right?
Now for the kicker...
| Code: | myhost / # ls /dev/mapper/
control hpt37x_dcicceigbb hpt37x_dcicceigbb1 hpt37x_dcicceigbb2
myhost / #
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So what happened to /dev/mapper/hpt37x_dcicceigbb3 ? Anyone have any ideas? The /boot partition is there, there /swap partition exists. So what happened to the main partition? Why is it not mappable? 
Anyone have any ideas?
My guess is that hde3 and hdg3 are of different sizes and that may be f'ing with the dmraid functionality. However, the hpt controller previously used to be able to manage the different sized volumes just fine. |
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aidanjt
Veteran
Joined: 20 Feb 2005
Posts: 1118
Location: Rep. of Ireland
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| Posted: Sun Mar 11, 2007 6:28 am Post subject: |
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| You will probably need to reboot the box for it to read the partition table properly, dmraid isn't very mature, it's a userspace hack for BIOS RAID devices since ataraid support was dropped from 2.6. |
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green_buddy
Tux's lil' helper
Joined: 08 Jan 2003
Posts: 115
Location: Bay Area, CA
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| Posted: Sun Mar 11, 2007 6:49 am Post subject: |
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I've definitely tried that for sure. Bummer ataraid support was dropped from 2.6. That makes sense though - the last time I had it working was with the 2.4 kernel.
So I'm probably going to do the unthinkable... I'm gonna go by a mac-mini and a couple of external hard drives and get software raid configured. 
5+ years ago I used to have the patience for this kinda stuff, but now I just want it to work. I can still atleast scp since the ssh daemon is working so I'll probably just mount /dev/hde3 and go from there. 
If anyone else can think of anything to save me from spending almost $900 that'd be awesome! |
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Installing Gentoo
