Changing the FS Type of the Root Partition - Revision history

Strstrep: /* Easier Procedure */

Strstrep — Tue, 01 Apr 2008 19:40:53 GMT

Easier Procedure

← Older revision		Revision as of 19:40, 1 April 2008
Line 95:		Line 95:
	## (Create the data partition with whatever filesystem you like)		## (Create the data partition with whatever filesystem you like)
	## mkswap /dev/sda5		## mkswap /dev/sda5
		+	## mount /dev/sdb1 /mnt/usbdisk1
	# mkfs.ext3 /dev/sda2		# mkfs.ext3 /dev/sda2
	# mount /dev/sda2 /mnt/disk1		# mount /dev/sda2 /mnt/disk1

Strstrep: /* Easier Procedure */

Strstrep — Tue, 01 Apr 2008 19:40:10 GMT

Easier Procedure

← Older revision		Revision as of 19:40, 1 April 2008
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	# cd /		# cd /
	# umount /dev/sda2		# umount /dev/sda2
		+	# Optional: Now would be a great time for [[Custom Partitions on the LS Pro]]—you'll lose all data on your partitions:
		+	## swapoff /dev/sda5
		+	## umount /boot
		+	## Use fdisk or cfdisk to edit the partition table for /dev/sda
		+	## Important: Reboot, again into EM.
		+	## (Create the data partition with whatever filesystem you like)
		+	## mkswap /dev/sda5
	# mkfs.ext3 /dev/sda2		# mkfs.ext3 /dev/sda2
	# mount /dev/sda2 /mnt/disk1		# mount /dev/sda2 /mnt/disk1

Strstrep: Don't use compression locally - CPU is too slow

Strstrep — Tue, 01 Apr 2008 17:50:16 GMT

Don't use compression locally - CPU is too slow

← Older revision		Revision as of 17:50, 1 April 2008
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	# mount /dev/sdb1 /mnt/usbdisk1		# mount /dev/sdb1 /mnt/usbdisk1
	# cd /mnt/disk1		# cd /mnt/disk1
-	# tar ~~czf~~ /mnt/usbdisk1/rootfs.tar~~.gz~~ .	+	# tar cvf /mnt/usbdisk1/rootfs.tar .
	# cd /		# cd /
	# umount /dev/sda2		# umount /dev/sda2
Line 91:		Line 91:
	# mount /dev/sda2 /mnt/disk1		# mount /dev/sda2 /mnt/disk1
	# cd /mnt/disk1		# cd /mnt/disk1
-	# tar ~~xzf~~ /mnt/usbdisk1/rootfs.tar~~.gz~~	+	# tar xvf /mnt/usbdisk1/rootfs.tar
	# Boot into normal mode.		# Boot into normal mode.

Strstrep: No dot

Strstrep — Tue, 01 Apr 2008 17:47:05 GMT

No dot

← Older revision		Revision as of 17:47, 1 April 2008
Line 91:		Line 91:
	# mount /dev/sda2 /mnt/disk1		# mount /dev/sda2 /mnt/disk1
	# cd /mnt/disk1		# cd /mnt/disk1
-	# tar xzf /mnt/usbdisk1/rootfs.tar.gz .	+	# tar xzf /mnt/usbdisk1/rootfs.tar.gz
	# Boot into normal mode.		# Boot into normal mode.

Strstrep: Added easier procedure

Strstrep — Tue, 01 Apr 2008 17:46:19 GMT

Added easier procedure

← Older revision		Revision as of 17:46, 1 April 2008
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	# format sda6 as JFS		# format sda6 as JFS
	# restore the contents of sda6 saved in step 1		# restore the contents of sda6 saved in step 1
		+
		+	===Easier Procedure===
		+
		+	# Format an external drive that's large enough as a file system EM can mount, such as ext3.
		+	# Boot into EM.
		+	# mount /dev/sda2 /mnt/disk1
		+	# mount /dev/sdb1 /mnt/usbdisk1
		+	# cd /mnt/disk1
		+	# tar czf /mnt/usbdisk1/rootfs.tar.gz .
		+	# cd /
		+	# umount /dev/sda2
		+	# mkfs.ext3 /dev/sda2
		+	# mount /dev/sda2 /mnt/disk1
		+	# cd /mnt/disk1
		+	# tar xzf /mnt/usbdisk1/rootfs.tar.gz .
		+	# Boot into normal mode.

	==Gathering Information==		==Gathering Information==

Ramuk at 15:30, 9 October 2007

Ramuk — Tue, 09 Oct 2007 15:30:26 GMT

← Older revision		Revision as of 15:30, 9 October 2007
Line 1:		Line 1:
		+	{{Articles\|LSPro}}
	There may be a time when you need to change the file system type used on your		There may be a time when you need to change the file system type used on your
	root partition. This might be because you want to get better performance or		root partition. This might be because you want to get better performance or

Eac at 06:07, 8 October 2007

Eac — Mon, 08 Oct 2007 06:07:10 GMT

Show changes

Eac: New page: Here's the overview. (Done while logged in as root): # backup /dev/sda6 # format sda6 as EXT3 (to use as a staging area) # boot into EM # copy sda2 partition to a file on sda6 # boot norm...

Eac — Sun, 07 Oct 2007 07:25:47 GMT

New page: Here's the overview. (Done while logged in as root): # backup /dev/sda6 # format sda6 as EXT3 (to use as a staging area) # boot into EM # copy sda2 partition to a file on sda6 # boot norm...

New page

Here's the overview. (Done while logged in as root):

# backup /dev/sda6
# format sda6 as EXT3 (to use as a staging area)
# boot into EM
# copy sda2 partition to a file on sda6
# boot normally
# copy the sda2 image file to a remote machine
# on the remote machine, loop mount the image
# create a tar copy of the contents of that image
# copy the tar file back to the LS-Pro (to sda6)
# boot into EM
# format sda2 as EXT3
# mount sda6 and sda2
# untar the tar file on top of sda2
# boot normally
# put the new kernel in place in /boot
# reboot
# format sda6 as JFS
# restore the contents of sda6 saved in step 1

And the details. (Done as root):

<ol>
<li>backup /dev/sda6. (Use whatever technique you prefer.)
<ol style="list-style-type:lower-alpha">
<li>scp -pr /mnt/disk1 remotehost:/temp-dir1</li>
</ol>
</li>

<li>format sda6 as EXT3 (to use as a staging area)
<ol style="list-style-type:lower-alpha">
<li>umount /mnt/disk1</li>
<li>mkfs.ext3 /dev/sda6</li>
<li>change the /etc/fstab entry for /dev/sda6 to ext3</li>
:/dev/sda6 /mnt/disk1 ext3 defaults,noatime,nodiratime 0 0
:(I don't know if noatime and nodiratime are appropriate for ext3)
<li>mount -t ext3 /mnt/disk1 (to make sure it works)</li>
</ol>
</li>

<li>boot into EM. (I did this rather than manually rebooting 3 times.)
<ol style="list-style-type:lower-alpha">
<li>cd /boot</li>
<li>mv rootfs_ok rootfs_booting</li>
<li>echo '****' > rootfs_booting</li>
<li>reboot</li>
</ol>
</li>

<li>copy sda2 partition to a file on sda6
<ol style="list-style-type:lower-alpha">
<li>telnet into LS-Pro (using login 'root')</li>
<li>mkdir temp1</li>
<li>mount -t ext3 /dev/sda6 temp1</li>
<li>dd if=/dev/sda2 of=temp1/part.image</li>
</ol>
</li>

<li>boot normally
<ol style="list-style-type:lower-alpha">
<li>cd /boot</li>
<li>mv rootfs_booting rootfs_ok</li>
<li>echo `date` > rootfs_ok</li>
<li>reboot</li>
</ol>
</li>

<li>copy the sda2 image file to a remote machine
<ol style="list-style-type:lower-alpha">
<li>scp /mnt/disk1/part.image remotehost:/temp-dir2</li>
(this may take a while if the image size is large)
</ol>
</li>

<li>on the remote machine, loop mount the image
<ol style="list-style-type:lower-alpha">
<li>cd /temp-dir2</li>
<li>mkdir temp3</li>
<li>mount -t xfs -o loop part.image temp3</li>
</ol>
</li>

<li>create a tar copy of the contents of that image
<ol style="list-style-type:lower-alpha">
<li>cd temp3</li>
<li>tar pzcvf ../part.tgz .</li>
</ol>
</li>

<li>copy the tar file back to the LS-Pro (back on the LS-Pro)
<ol style="list-style-type:lower-alpha">
<li>scp remotehost:/temp-dir2/part.tgz /mnt/disk1</li>
</ol>
</li>

<li>boot into EM
<ol style="list-style-type:lower-alpha">
<li>cd /boot</li>
<li>mv rootfs_ok rootfs_booting</li>
<li>echo '****' > rootfs_booting</li>
<li>reboot</li>
</ol>
</li>

<li>format sda2 as EXT3 (the scary part)
<ol style="list-style-type:lower-alpha">
<li>mkfs.ext3 /dev/sda2</li>
</ol>
</li>

<li>mount sda6 and sda2
<ol style="list-style-type:lower-alpha">
<li>mkdir temp-dir1</li>
<li>mount -t ext3 /dev/sda6 temp-dir1</li>
<li>mkdir temp-dir2</li>
<li>mount -t ext3 /dev/sda2 temp-dir2</li>
</ol>
</li>

<li>untar the tar file on top of sda2
<ol style="list-style-type:lower-alpha">
<li>cd temp-dir1</li>
<li>gunzip part.tgz</li>
(I had to explicitly gunzip the file as the busybox tar available in EM can't do it inline)
<li>cd ../temp-dir2</li>
<li>tar pxvf ../temp-dir1/part.tar</li>
</ol>
</li>

<li>boot normally
<ol style="list-style-type:lower-alpha">
<li>cd /boot</li>
<li>mv rootfs_booting rootfs_ok</li>
<li>echo `date` > rootfs_ok</li>
<li>reboot</li>
</ol>
</li>

<li>put the new kernel in place in /boot
<ol style="list-style-type:lower-alpha">
<li>cd /boot</li>
<li>cp uImage.buffalo uImage.buffalo-2.6.12.6</li>
(I left the old kernel in /boot in case I need to boot back to it)
<li>scp remotehost:/where/the/new/kernel/is uImage.buffalo-2.6.22</li>
<li>cp uImage.buffalo-2.6.22 uImage.buffalo</li>
(Also bring over any modules you may have cross built)
<li>cd /lib/modules</li>
<li>scp -r remotehost:/where/the/modules/are 2.6.22</li>
</ol>
</li>

<li>reboot
<ol style="list-style-type:lower-alpha">
<li>make any offerings deemed necessary and cross fingers</li>
<li>reboot</li>
(Ideally you are up on the new kernel at this point)
</ol>
</li>

<li>format sda6 as JFS
<ol style="list-style-type:lower-alpha">
<li>apt-get install jfsutils (if the utils are not already installed)</li>
<li>umount /mnt/disk1</li>
<li>mkfs.jfs -c /dev/sda6</li>
(using the '-c' option made this step take several hours)
<li>modify the partition type for /dev/sda6 line in /etc/fstab</li>
:/dev/sda6 /mnt/disk1 jfs defaults,noatime,nodiratime 0 2
:(here too, I'm not sure if noatime and nodiratime are appropriate for JFS)
<li>mount -t jfs /mnt/disk1 (to make sure it works)</li>
</ol>
</li>

<li>restore the contents of sda6 saved in step 1
<ol style="list-style-type:lower-alpha">
(use your favorite technique)
<li>scp -pr remotehost:/temp-dir1 /mnt/disk1</li>
</ol>
</li>
</ol>