Options may be used to modify this behavior based on range or size, as explained below. Unlike fstrim(8), this command is used directly on the block device.īy default, blkdiscard will discard all blocks on the device. This is useful for solid-state drivers ( SSDs) and thinly-provisioned storage. To find the right disk: tree /dev/disk/by-id/ blkdiscard – discard sectors on a deviceīlkdiscard is used to discard device sectors. Prints information about sda and all partitions on sda wipefs /dev/sda*Įrases all signatures from the device /dev/sdb wipefs -all /dev/sdb Sector size (logical/physical): 512B/4096Bĭisk Flags: parted /dev/disk/by-id/scsi-3.55d mklabel gpt mkpart P1 btrfs 2048s 100% wipefs – wipe a signature from a device parted – a partition manipulation program $ parted /dev/sdb print Sgdisk reads and writes partition tables, but is not interactive like fdisk or cfdisk (it reads input from a file or stdin). Using their values would mean that the backup GPT at the end of disk would be left broken. Based on the offset values (0x3b9e655e00 vs 0x37e4895e00), they had a slightly larger disk than you did (256 GB vs 240 GB). Sgdisk – Command-line GUID partition table (GPT) manipulator for Linux and Unix sgdisk -zap-all /dev/sdX You'll need to use the values you got from wipefs. I tried manually writing over the GPT and swap partition with 2. You may need to delete an EFI GPT (0圎E) partition with fdisk or another tool. Proceed (Y/N): y GPT data structures destroyed You may now partition the disk using fdisk or other utilities. GPT data structures destroyed! You may now partition the disk using fdisk or Command ( for help): x Expert command ( for help): z About to wipe out GPT on /dev/sdc. The new table will be used at the next reboot or after you Warning: The kernel is still using the old partition table. The wipefs program lets you easily delete the partition-table signature: wipefs -a /dev/sda From man wipefs. gdisk – Interactive GUID partition table (GPT) manipulator Wipe out GPT (zap) gdisk /dev/sdaįound valid GPT with protective MBR using GPT.Ībout to wipe out GPT on /dev/sda. Sfdisk reads and writes partition tables, but are not interactive like fdisk or cfdisk (it reads input from a file or stdin). Sfdisk – display or manipulate a disk partition table blkdiscard – discard sectors on a device. wipefs – wipe a signature from a device.parted – a partition manipulation program Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products.gdisk – Interactive GUID partition table (GPT) manipulator Here are the practical steps on the /dev/sdb drive1) Create GPT partition tableBefore creating the partition table, you should use wipefs to wipe the. Note that youll have to recreate the original partition layout and wipefs -a the partitions, for this to work.
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