----- Message from [EMAIL PROTECTED] ---------
Date: Thu, 10 Jan 2008 14:58:49 -0800
From: Dennison Williams <[EMAIL PROTECTED]>
Reply-To: Dennison Williams <[EMAIL PROTECTED]>
Subject: The effects of multiple layers of block drivers
To: [email protected]Hello, I am starting to dig into the Block subsystem to try and uncover the reason for some data I lost recently. My situation is that I have multiple block drivers on top of each other and am wondering how the effectss of a raid 5 rebuild would affect the block devices above it. The layers are raid 5 -> lvm -> cryptoloop. It seems that after the raid 5 device was rebuilt by adding in a new disk, that the cryptoloop doesn't have a valid ext3 partition on it. As a raid device re-builds is there ant rearranging of sectors or corresponding blocks that would effect another block device on top of it? Sincerely, Dennison Williams
----- End message from [EMAIL PROTECTED] -----If you add a disk and do a reshape the layer on top of the raid5 should only notice that the device is larger now. But yes, there is a rearranging of sectors going on. However this is transparent to layers on top. Did you have a disk failure during the reshape? If yes you probably have been bitten by the same bug as me: (http://marc.info/?l=linux-raid&m=119910305111460&w=2).
Kind regards, ======================================================================== # _ __ _ __ http://www.nagilum.org/ \n icq://69646724 # # / |/ /__ ____ _(_) /_ ____ _ [EMAIL PROTECTED] \n +491776461165 # # / / _ `/ _ `/ / / // / ' \ Amiga (68k/PPC): AOS/NetBSD/Linux # # /_/|_/\_,_/\_, /_/_/\_,_/_/_/_/ Mac (PPC): MacOS-X / NetBSD /Linux # # /___/ x86: FreeBSD/Linux/Solaris/Win2k ARM9: EPOC EV6 # ======================================================================== ---------------------------------------------------------------- cakebox.homeunix.net - all the machine one needs..
pgpuSdM5nfzhH.pgp
Description: PGP Digital Signature
