search for: superblocks

Hi, Using dumpe2fs I have been able to determine that all of my alternate ext3 superblocks are corrupted (not clean), and only the primary superblock is valid, i.e. mount works and the ordered journal is applied. When the primary superblock gets flakey, i.e. the ext_attr Filesystem feature goes missing - not sure why this occurs. At this point, the mount does not apply the journal usin...

...it uses the alternate superblock and proceeds. However, it restarts from the beginning a couple of times and after the second restart it doesn't use the alternate superblock, stopping instead as it can't find the original one. Is there a way around this, such as using one of the alternate superblocks to replace the broken one, or a way of forcing fsck to keep on using the alternate one? The checking process is taking several hours in each case, as it's quite a large filesystem. Thanks for any suggestions. Adam

...ech Republic). We use LLVM for many >> projects and actually we want to create system, which will be able >> compile and profile aplication for VLIW processors in few iterations. >> We want to load profile information in 'opt' part of LLVM and use it >> for create superblocks. Note, when superblocks will be created, we >> want to use llc for our specials backends. > > I suggest looking at the problem upside-down. What optimization do you > need to enable on superblocks, and how will changing the IR help? Any > single predecessor blocks laid out sequ...

...chnology (university VUT in Brno Czech Republic). We use LLVM for many projects and actually we want to create system, which will be able compile and profile aplication for VLIW processors in few iterations. We want to load profile information in 'opt' part of LLVM and use it for create superblocks. Note, when superblocks will be created, we want to use llc for our specials backends. *.ll -> opt -> llc -> *.asm | profile information We are thinking about creating superblocks in two ways: 1. Simply join basic blocks and branch instrunction in the...

...hnology (university VUT in Brno Czech Republic). We use LLVM for many projects and actually we want to create system, which will be able compile and profile aplication for VLIW processors in few iterations. > We want to load profile information in 'opt' part of LLVM and use it for create superblocks. Note, when superblocks will be created, we want to use llc for our specials backends. I suggest looking at the problem upside-down. What optimization do you need to enable on superblocks, and how will changing the IR help? Any single predecessor blocks laid out sequentially looks like a superbloc...

...(university VUT in Brno Czech Republic). We use LLVM for many projects and actually we want to create system, which will be able compile and profile aplication for VLIW processors in few iterations. >>> We want to load profile information in 'opt' part of LLVM and use it for create superblocks. Note, when superblocks will be created, we want to use llc for our specials backends. >> >> I suggest looking at the problem upside-down. What optimization do you need to enable on superblocks, and how will changing the IR help? Any single predecessor blocks laid out sequentially look...

...superblock in the CFG and then tile it down into basic MBBs. But the only reason that I can think of for that would be codegen simplicity and with GlobalISel, I would think that would no longer be the case. Anyways, am I getting this right? If so, is there any way to control the creation of these superblocks, that is, which basic blocks from the CFG go into a given MBB? I'm still in the MC layer, so I really don't know where in the MI layer this sort of tiling of the CFG is done. (In a full blown superblock formation that tiling would be a profile driven decision for finding the hot trace.) I...

Hi all, While developing compile-time instrumentation for ThreadSanitizer (http://code.google.com/p/data-race-test) I need to generate SEME regions without loop and call instructions (I'll call them superblocks hereafter, although some researchers do allow loops in their definition of superblocks). This is necessary to get the largest piece of IR in which the memory operations can be enumerated in order to record the addresses of the memory accesses into a fixed-size buffer. So far I was using my home-b...

I've got this poor ext3-partition which I can't access. I have tried a lot of things but it doesn't seem to solve the problem. I've got quite important files on that particular partition. I can't even get the block groups from my /dev/hda3 with dumpe2fs! It all happened after a crash. GRUB wouldn't give me the graphical UI. I decided I had to get my dosbootdisk and do an

On May 25, 2014 3:39 AM, "Geert Stappers" <stappers at stappers.nl> wrote: > > > While going throug old posts found: > > Op 2013-08-31 om 17:01 schreef Raphael S.Carvalho: > > Calc the size of ldlinux.sys from ldlinux.bin, and check if it exceeds the limit. > > ldlinux.sys must fit between the bootsector and two copies of ADV whose size may vary. >

Hi, I am using kernel 2.6.15.4. On my system, I first created a partition with EXT3 and put some data on it. Later, I deleted the partition, and re-created another partition with the same starting block number and a higher ending block number. I intended to format it with another filesystem, but surprisingly (or maybe just to me), the superblock of the partition had not changed. I could still

Hi list this is actually a problem on a debian system but I thought you might be interested to hear of it and perhaps can offer some help. I have a woody box (dell pe750, dual cpu) running a kernel from backports.org (debian 'testing' packages built on a 'stable' box). The kernel version is 2.6.7-1.backports.org.1. This host is hooked up to an Apple Xserve RAID with a 2.3Tbyte

...net-lv_spool: clean, 372/614400 files, 171186/2457600 blocks *** An error occurred during the file system check. *** Dropping you to a shell; the system will reboot *** when you leave the shell. Give root password for maintenance (or type Control-D to continue): I ran mke2fs to locate the backup superblocks: mke2fs -n /dev/mapper/vg_voinet01-lv_log . . . Superblock backups stored on blocks: 32768, 90304, 163840, 229376, 294912, 819200, 884736, 1605632 and ran: e2fsck -b 32768 /dev/mapper/vg_voinet01-lv_log The superblock could not be read or does not describe a correct ext2 The same thing h...

It recently occurred to me, as I was partitioning a RAID with fdisk, that when I built the system, I was presented with a graphical utility that "magically" created the partitions. Now, using fdisk, I was reminded of being given superblocks. Although I haven't used data recovery techniques using superblocks, is there a way to retrieve the superblock numbers the OS has assigned to a partition? Thanks. Scott

Hi all, Somehow I managed to mess with a RAID array containing an ext3 partition. Parenthesis, if it matters: I disconnected physically a drive while the array was online. Next thing, I lost the right order of the drives in the array. While trying to re-create it, I overwrote the raid superblocks. Luckily, the array was RAID5 degraded, so whenever I re-created it, it didn't go into sync; thus, everything besides the RAID superblocks is preserved (or so I think). Now, I am trying to re-create the array in the proper order. It takes me countless attempts, through hundreds of permutations...

Hello everybody, I am new to this list, so welcome everybody. Last 2 week I had two harddisk crashes with my ext2 file system. This is what sort of happed with both of the disk: I pluged in my USB to SATA converter in my harddisk that has an ext2 filesystem. I mounted the partition, went to a directory that had a DVD image. I mounted the dvd image in the same directory and started watching the

...why is sde working and not sda? this system has previously held 6.8, but partitioning was off in cylinders so i decided to correct. purchased latest release of partedmagic, booted, created new partitioning by cylinders. under pmagic, when i enter command; dumpe2fs /dev/sda3 | grep superblock superblocks are shown. so, how do i correct what ever to install 6.8 to sda, not sde? any/all answers/suggestions greatly appreciated. tia. -- peace out. CentOS GNU/Linux 7.1511 tc,hago. g . =+= Tired of having your microsoft os hacked? Change to Linux os, used by microsoft hackers. =+= in a world...

...scriptors corrupted. of course i tried e2fsck (v 1.27), but it said it could not see an ext3 on the partiiton and suggested to try another superblock (here: 8193). hopes surging, but bad luck, because block 8193 is also within the deleted area. My question therefore is, if there are any (backup) superblocks on an arbitrary ext3 partiiton which i could access to recover some data at least. I tried the formula (8192*n +1), but bad luck.....i assume that backup superblocks are not sprayed round the partition like that. anyway, if anybody'd have some some suggestions, i'd be most grateful. ben

I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1, missing

I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS.  This is the error messings I get when I try: root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/ libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1, missing