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1. #Btrfs wipefs drivers#
2. #Btrfs wipefs update#
3. #Btrfs wipefs Patch#
4. #Btrfs wipefs code#
5. #Btrfs wipefs series#

+ uint64_t zone_size /* zone size (BLKGETZONESZ ioctl) */ Unsigned int blkssz /* sector size (BLKSSZGET ioctl) */ + long kboff_inzone /* kilobyte offset of superblock in a zone -206,6 +210,7 struct blkid_struct_probeĭev_t disk_devno /* devno of the whole-disk or 0 */ + long zonenum /* zone number which has superblock */ + int is_zoned /* indicate magic location is calcluated based on zone position */ Unsigned int sboff /* byte offset within superblock */ Long kboff /* kilobyte offset of superblock */ Libblkid/src/probe.c | 29 +++++++++++++++++++++++++++-ģ files changed, 33 insertions(+), 2 deletions(-)ĭiff -git a/libblkid/src/blkidP.h b/libblkid/src/blkidP.hĬonst char *hoff /* hint which contains byte offset to kboff */ The magic location is placed related to a zone, and the offset in the zone.Īlso, this commit introduces `zone_size` to struct blkid_struct_probe.

#Btrfs wipefs Patch#

Ths patch introduces some new fields to struct blkid_idmag. Some offset from the beginning of some specific zone of a device. ` (3 subsequent siblings) 4 siblings, 3 replies 20+ messages in thread 1:33 ` blkid: add magic and probing for zoned btrfs Naohiro Aota 1:33 implement zone-aware probing/wiping for zoned btrfs Naohiro 1:33 ` Naohiro Aota

#Btrfs wipefs series#

Finally, this series also implementsīlkid: add magic and probing for zoned btrfs Then, it adds magics for zoned btrfs and implements a probing function toĭetect the latest superblock. This series first implements zone based detection of the magic location. Writing to the first zone again, it reset the first zone. When both zones are filled up and before start Once the first zone is filled up, start writing It uses two zones as a circular buffer to

#Btrfs wipefs update#

Thus, zoned btrfs use superblock log writing to update superblock on Required zone, we cannot place superblock in the zone. Since we cannot overwrite in a sequential write Superblock (and its copies) is the only data structure in btrfs with aįixed location on a device. Writes be issued in LBA order from each zone write pointer position. Zones are eitherĬonventional and accepting random writes or sequential and requiring that Zoned btrfs is merged with this superblock locations are finalized with this zoned block device consists of a number of zones. Fix the build without HAVE_LINUX_BLKZONED_H This series implements probing and wiping of the superblock of zoned btrfs. ` (4 more replies) 0 siblings, 5 replies 20+ messages in threadĬc: util-linux, linux-btrfs, linux-fsdevel, Damien Le Moal, 1:33 ` blkid: implement zone-aware probing Naohiro Aota

#Btrfs wipefs code#

Options may be used to modify this behavior based on range or size, as explained below.Implement zone-aware probing/wiping for zoned btrfs All the mail mirrored from help / color / mirror / code / Atom feed * implement zone-aware probing/wiping for zoned btrfs 1:33 Naohiro Aota Unlike fstrim(8), this command is used directly on the block device.īy default, blkdiscard will discard all blocks on the device.

#Btrfs wipefs drivers#

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). Sgdisk – Command-line GUID partition table (GPT) manipulator for Linux and Unix sgdisk -zap-all /dev/sdX GPT data structures destroyed! You may now partition the disk using fdisk or The new table will be used at the next reboot or after you Warning: The kernel is still using the old partition table. 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