Commands tagged partition (23)

  • Yields entries in the form of "/dev/hda1" etc. Use this if you are on a new system and don't know how the storage hardware (ide, sata, scsi, usb - with ever changing descriptors) is connected and which partitions are available. Far better than using "fdisk -l" on guessed device descriptors. Show Sample Output

    hwinfo --block --short
    Schneckentreiber · 2009-04-24 11:13:31 4
  • Shows the UUID of the given partition (here /dev/sda7). Doesn't need to be root. Show Sample Output

    blkid /dev/sda7
    lineak · 2010-09-05 12:20:45 1
  • Suppose you made a backup of your hard disk with dd: dd if=/dev/sda of=/mnt/disk/backup.img This command enables you to mount a partition from inside this image, so you can access your files directly. Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img). Show Sample Output

    INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE" "$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]
    Alanceil · 2009-03-06 21:29:13 3
  • See size of partitions as human readable and get extra informations about hdd and partitions Show Sample Output

    parted /dev/sda print
    mesuutt · 2012-06-05 09:11:06 0
  • Instead of calculating the offset and providing an offset option to mount, let lomount do the job for you by just providing the partition number you would like to loop mount.

    lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo
    olorin · 2009-07-22 11:32:52 1

  • 4
    losetup /dev/loop0 harddrive.img; kpartx -a -v /dev/loop0; mount /dev/mapper/loop0p1 /mountpoint/
    oernii3 · 2010-10-30 11:52:11 3
  • Shows all block devices in a tree with descruptions of what they are.

    BasketCase · 2012-09-12 15:30:25 0

  • 2
    sfdisk -d /dev/sda | sed 's/sda/sdb/g' | sfdisk /dev/sdb
    kobayashison · 2009-12-22 23:35:30 1
  • Reports all local partitions having more than 90% usage. Just add it in a crontab and you'll get a mail when a disk is full. (sending mail to the root user must work for that) Show Sample Output

    df -l | grep -e "9.%" -e "100%"
    dooblem · 2010-04-26 17:57:54 0
  • The above command assumes the lost data is on /dev/sda and you previously issued the following command to mount _another_ disk or partition (/dev/sdb1) on /recovery sudo mount /dev/sdb1 /recovery If you don't do this, the data could be overwrited! foremost is a very powerful carving tool. By default foremost recovers all known file types. If you want to reduce the amount of files that are recovered you can specify the file type you are looking for. Read the man page to know the available file types. i.e to recover JPEG pictures append to foremost the switch -tjpg

    sudo foremost -i /dev/sda -o /recovery
    vlan7 · 2010-08-19 22:27:41 0
  • `blkid` is an interface to libuuid - it can read Device Mapper, EVMS, LVM, MD, and regular block devices. -c /dev/null - Do not use cached output from /etc/ or /etc/blkid/ (RHEL) -i - Display I/O Limits (aka I/O topology) information (not available in RHEL) -p - Low-level superblock probing mode (not available in RHEL) Show Sample Output

    blkid -c /dev/null
    mhs · 2012-09-12 13:34:41 2
  • lsblk | grep mountpoint Show Sample Output

    lsblk | grep <mountpoint>
    totti · 2014-02-05 09:41:00 1

  • 1
    sfdisk -d /dev/sda | sfdisk /dev/sdb
    wincus · 2010-02-03 14:49:07 1
  • Necessary for fsck for example. The remount functionality follows the standard way how the mount command works with options from fstab. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified. After this call all old mount options are replaced and arbitrary stuff from fstab is ignored, except the loop= option which is internally generated and maintained by the mount command. It does not change device or mount point.

    mount -o remount,ro /dev/foo /
    vlan7 · 2010-10-30 03:51:53 1
  • To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512 Show Sample Output

    fdisk -l /dev/sda | grep -E sda[0-9]+ | sed s/*// | awk '{printf ("%s %f ",$1,$2/512); if($2%512){ print "BAD" }else {print "Good"} }' | column -t
    The_IceMan_Blog · 2012-05-18 08:34:36 1
  • Show the UUID-based alternate device names of ZEVO-related partitions on Darwin/OS X. Adapted from the lines by dbrady at and following the disk device naming scheme at Show Sample Output

    ls /dev/disk* | xargs -n 1 -t sudo zdb -l | grep GPTE_
    grahamperrin · 2012-10-06 20:19:45 0

  • 1
    mount -o sb=98304 /dev/sda5 /mnt/data5
    rugina · 2013-06-25 08:50:44 2
  • XX is your device partition number like /dev/sdc1 . to see how many inodes your partition have type: df --inodes (or df -i) Default formatting with ext4 would create small inode count for the new partition if you need big count of inodes is the fstype news the correct one. in debian you can see which fstype exists as template in: vim /etc/mke2fs.conf if you format default ext for a partition size with 1TB you would get 1 Million inodes (not enough for backupStorages) but if you format with fstype news you would get hunderd of millions of inodes for the partition. you have tune /etc/sysctl.conf also with following sysconfig parameters fs.file-max = XXX fs.nr_open = XXX where XXX is the count of max inodes for whole system

    mkfs.ext4 -T news /dev/sdcXX
    aysadk · 2019-07-02 13:31:23 0
  • Creates a single primary partition starting at sector 0 and extending to the end of the disk. Use with care.

    echo "0,,L" | sfdisk /dev/sdX
    twobitsprite · 2012-04-09 18:36:24 0
  • Another alternative to blkid, lsblk, file -s, cat /proc/paritions, fdisk -l, etc.. Show Sample Output

    fsarchvier probe simple
    0xFF · 2013-04-28 10:16:18 0

  • 0
    sudo dumpe2fs /dev/sda1 | grep superblock
    rugina · 2013-06-25 08:48:49 118

  • -1
    diskutil list
    grahamperrin · 2012-10-06 21:18:27 0
  • *as long as the drives are exactly the same* then this command copies the partition table on /dev/sda to /dev/sdb

    sfdisk /dev/sdb <(sfdisk -d /dev/sda| perl -pi -e 's/sda/sdb/g')
    linuxrawkstar · 2009-12-22 22:45:41 0

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Run a ext4 file system check and badblocks scan with progress info
Nothing fancy, just a regular filesystem scan that calls the badblocks program and shows some progress info. The used options are: -c ? check for bad sectors with badblocks program -D ? optimize directories if possible -f ? force check, even if filesystem seems clean -t ? print timing stats (use -tt for more) -y ? assume answer ?yes? to all questions -C 0 ? print progress info to stdout /dev/sdxx ? the partition to check, (e.g. /dev/sda1 for first partition on first hard disk) NOTE: Never run fsck on a mounted partition!

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