Hello, On Mon, Dec 22, 2008 at 4:10 PM, Sandeep K Sinha <sandeepksinha@xxxxxxxxx> wrote: [snip] >> Can you please describe any scenario, where this may happen? >> One i can think of is when your /sbin is groked. >> > Well, there can be many scenario's which may lead to such situations. > In commodity file systems liek ext2/ext3 we dont handle sector failures. > If such in-consistency occurs at your fs level, then you will be in > big problems. yes indeed. > > Also, there can be possible situations where your superblock gets > corrupted and the fsck wont have any information pertaining to the > disk layout of the Fs. > In such scenario, you won't even have access to the duplicate SB's. > Duplicate SB's are helpful mostly when you have some kind of > inconsistencies in the SB data but when the SB itself is corrupted, > who will tell you where the alternative SB is ? AFAIK , location of duplicate superblocks is decided by the block size and thus is not explicitly stored in the superblock, though I am not sure of this. Maybe one well versed with fs internals can shed some light on this matter. Cu, --Pradeep >> I wonder if this is the case, then what happens when fsck itself >> cannot be invoked. though your superblock is intact you still cannot >> have a sane state for your fs because effectively fsck is not there. >> How do we handle such situations? > > Obviously you will have to have something like a fsck. > Look for some other similar tools. > Also, if fsck fails for its own reason, it will probably be temporary, I assume. >> Any hints? >> > > >> Thanks for the inputs Sandeep, >> ~Pradeep >>> >>> HTH, >>> >>>> Thanks, >>>> ~Pradeep >>>>> >>>>>> >>>>>> Thanks >>>>>> Shyam. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Regards, >>>>> Sandeep. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> "To learn is to change. Education is a process that changes the learner." >>>>> >>>>> -- >>>>> To unsubscribe from this list: send an email with >>>>> "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx >>>>> Please read the FAQ at http://kernelnewbies.org/FAQ >>>>> >>>>> >>>> >>>> >>>> >>>> -- >>>> Pradeep >>>> >>> >>> >>> >>> -- >>> Regards, >>> Sandeep. >>> >>> >>> >>> >>> >>> >>> "To learn is to change. Education is a process that changes the learner." >>> >> >> >> >> -- >> Pradeep >> > > > > -- > Regards, > Sandeep. > > > > > > > "To learn is to change. Education is a process that changes the learner." > -- Pradeep -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
