Re: [PATCH 008 of 8] md/bitmap: Change md/bitmap file handling to use bmap to file blocks.

2006-05-14 Thread Neil Brown
On Saturday May 13, [EMAIL PROTECTED] wrote: Paul Clements [EMAIL PROTECTED] wrote: Andrew Morton wrote: The loss of pagecache coherency seems sad. I assume there's never a requirement for userspace to read this file. Actually, there is. mdadm reads the bitmap file, so that

Re: [PATCH 008 of 8] md/bitmap: Change md/bitmap file handling to use bmap to file blocks.

2006-05-14 Thread Andrew Morton
Neil Brown [EMAIL PROTECTED] wrote: On Saturday May 13, [EMAIL PROTECTED] wrote: Paul Clements [EMAIL PROTECTED] wrote: Andrew Morton wrote: The loss of pagecache coherency seems sad. I assume there's never a requirement for userspace to read this file. Actually,

Re: softraid and multiple distros

2006-05-14 Thread Mark Hahn
What do I need to do when I want to install a different distro on the machine with a raid5 array? Which files do I need? /etc/mdadm.conf? /etc/raittab? both? MD doesn't need any files to function, since it can auto-assemble arrays based on their superblocks (for partition-type 0xfd). - To

Re: softraid and multiple distros

2006-05-14 Thread Dexter Filmore
Am Sonntag, 14. Mai 2006 16:50 schrieben Sie: What do I need to do when I want to install a different distro on the machine with a raid5 array? Which files do I need? /etc/mdadm.conf? /etc/raittab? both? MD doesn't need any files to function, since it can auto-assemble arrays based on

Re: softraid and multiple distros

2006-05-14 Thread Mark Hahn
Now the devices have all two superblocks, the one left from the first try which are now kinda orphaned and those now active. Can I trust mdadm to handle this properly on its own? I'm not sure what properly means. you should not leave around 0xfd partitions with bogus superblocks, since MD

Re: Problem with large devices 2TB

2006-05-14 Thread H. Peter Anvin
Followup to: [EMAIL PROTECTED] By author:Jim Klimov [EMAIL PROTECTED] In newsgroup: linux.dev.raid Since the new parted worked ok (older one didn't), we were happy until we tried a reboot. During the device initialization and after it the system only recognises the 6 or 7

Re: softraid and multiple distros

2006-05-14 Thread Neil Brown
On Sunday May 14, [EMAIL PROTECTED] wrote: Am Sonntag, 14. Mai 2006 16:50 schrieben Sie: What do I need to do when I want to install a different distro on the machine with a raid5 array? Which files do I need? /etc/mdadm.conf? /etc/raittab? both? MD doesn't need any files to

Re: [PATCH 008 of 8] md/bitmap: Change md/bitmap file handling to use bmap to file blocks.

2006-05-14 Thread Neil Brown
(replying to bits of several emails) On Friday May 12, [EMAIL PROTECTED] wrote: Neil Brown [EMAIL PROTECTED] wrote: However some IO requests cannot complete until the filesystem I/O completes, so we need to be sure that the filesystem I/O won't block waiting for memory, or fail with