Re: [reiserfs-list] Can ReiserFS handle removable storage?
Hello! On Sat, Jan 19, 2002 at 10:46:09AM +0100, Russell Coker wrote: USB by it's nature is something external to the system. Unplugging a USB cable with a mounted drive attached should (IMHO) get the same result as unplugging an Ethernet cable with an NFS mount in progress. This means processes go into D state if they have outstanding writes, and for reads they may go D state depending on mount options, and then you wait for the device to become available again. How do you distinguish between SCSI USB storage in Linux on fs level? ;) For a file system on USB ReiserFS would have to recheck the superblock (to make sure that it hasn't been mounted on another computer in the mean time) before allowing access again. Also there would have to be a recovery process for the situation when the USB device is gone for good. Sound not very easy to do ;) Bye, Oleg
Re: [reiserfs-list] ReiserFS reguarding Superblocks
Hello! On Sun, Jan 20, 2002 at 03:44:01PM -0500, Shawn wrote: I've noticed that ReiserFS only have one superblock (?) Is there away I Actually there is up to 4 (?) superblocks copies that can be stored in journal. can back this superblock up and or make more of them? What for. reiserfsck have --rebuild-sb option that seems to be working for everybody. I've had reiserfs eat it once and lost all my data :/ Have you tried reiserfsck? Bye, Oleg
Re: [reiserfs-list] Can ReiserFS handle removable storage?
On Mon, 21 Jan 2002 07:28, Oleg Drokin wrote: USB by it's nature is something external to the system. Unplugging a USB cable with a mounted drive attached should (IMHO) get the same result as unplugging an Ethernet cable with an NFS mount in progress. This means processes go into D state if they have outstanding writes, and for reads they may go D state depending on mount options, and then you wait for the device to become available again. How do you distinguish between SCSI USB storage in Linux on fs level? ;) You can have SCSI and IDE unpluggable devices too... For a file system on USB ReiserFS would have to recheck the superblock (to make sure that it hasn't been mounted on another computer in the mean time) before allowing access again. Also there would have to be a recovery process for the situation when the USB device is gone for good. Sound not very easy to do ;) True. Writing a good file system is never easy. -- http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/projects.html Projects I am working on http://www.coker.com.au/~russell/ My home page
Re: [reiserfs-list] ReiserFS reguarding Superblocks
Well, it said my partition size was out of range then could not repair superblock and blew up :/ Hopefully, its fixed now. On Mon, 21 Jan 2002, Oleg Drokin wrote: Hello! On Sun, Jan 20, 2002 at 03:44:01PM -0500, Shawn wrote: I've noticed that ReiserFS only have one superblock (?) Is there away I Actually there is up to 4 (?) superblocks copies that can be stored in journal. can back this superblock up and or make more of them? What for. reiserfsck have --rebuild-sb option that seems to be working for everybody. I've had reiserfs eat it once and lost all my data :/ Have you tried reiserfsck? Bye, Oleg
Re: [reiserfs-list] ReiserFS reguarding Superblocks
Hello! In fact we are very interested to hear all unsuccesful stories of using reiserfsck to recover dead partitions. Also ability to tell us exact requested data (dependent on each case) is good, too. This way both we and users can benefit in having consistent data and stable tools to recover data, if something still got wrong. Bye, Oleg On Mon, Jan 21, 2002 at 02:11:31AM -0500, Shawn Starr wrote: Well, it said my partition size was out of range then could not repair superblock and blew up :/ Hopefully, its fixed now. On Mon, 21 Jan 2002, Oleg Drokin wrote: Hello! On Sun, Jan 20, 2002 at 03:44:01PM -0500, Shawn wrote: I've noticed that ReiserFS only have one superblock (?) Is there away I Actually there is up to 4 (?) superblocks copies that can be stored in journal. can back this superblock up and or make more of them? What for. reiserfsck have --rebuild-sb option that seems to be working for everybody. I've had reiserfs eat it once and lost all my data :/ Have you tried reiserfsck? Bye, Oleg
