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-What: /sys/class/ubi/
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- The ubi/ class sub-directory belongs to the UBI subsystem and
- provides general UBI information, per-UBI device information
- and per-UBI volume information.
-
-What: /sys/class/ubi/version
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- This file contains version of the latest supported UBI on-media
- format. Currently it is 1, and there is no plan to change this.
- However, if in the future UBI needs on-flash format changes
- which cannot be done in a compatible manner, a new format
- version will be added. So this is a mechanism for possible
- future backward-compatible (but forward-incompatible)
- improvements.
-
-What: /sys/class/ubiX/
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- The /sys/class/ubi0, /sys/class/ubi1, etc directories describe
- UBI devices (UBI device 0, 1, etc). They contain general UBI
- device information and per UBI volume information (each UBI
- device may have many UBI volumes)
-
-What: /sys/class/ubi/ubiX/avail_eraseblocks
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Amount of available logical eraseblock. For example, one may
- create a new UBI volume which has this amount of logical
- eraseblocks.
-
-What: /sys/class/ubi/ubiX/bad_peb_count
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Count of bad physical eraseblocks on the underlying MTD device.
-
-What: /sys/class/ubi/ubiX/bgt_enabled
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Contains ASCII "0\n" if the UBI background thread is disabled,
- and ASCII "1\n" if it is enabled.
-
-What: /sys/class/ubi/ubiX/dev
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Major and minor numbers of the character device corresponding
- to this UBI device (in <major>:<minor> format).
-
-What: /sys/class/ubi/ubiX/eraseblock_size
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Maximum logical eraseblock size this UBI device may provide. UBI
- volumes may have smaller logical eraseblock size because of their
- alignment.
-
-What: /sys/class/ubi/ubiX/max_ec
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Maximum physical eraseblock erase counter value.
-
-What: /sys/class/ubi/ubiX/max_vol_count
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Maximum number of volumes which this UBI device may have.
-
-What: /sys/class/ubi/ubiX/min_io_size
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Minimum input/output unit size. All the I/O may only be done
- in fractions of the contained number.
-
-What: /sys/class/ubi/ubiX/mtd_num
-Date: January 2008
-KernelVersion: 2.6.25
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Number of the underlying MTD device.
-
-What: /sys/class/ubi/ubiX/reserved_for_bad
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Number of physical eraseblocks reserved for bad block handling.
-
-What: /sys/class/ubi/ubiX/total_eraseblocks
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Total number of good (not marked as bad) physical eraseblocks on
- the underlying MTD device.
-
-What: /sys/class/ubi/ubiX/volumes_count
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Count of volumes on this UBI device.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/,
- etc directories describe UBI volumes on UBI device X (volumes
- 0, 1, etc).
-
-What: /sys/class/ubi/ubiX/ubiX_Y/alignment
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Volume alignment - the value the logical eraseblock size of
- this volume has to be aligned on. For example, 2048 means that
- logical eraseblock size is multiple of 2048. In other words,
- volume logical eraseblock size is UBI device logical eraseblock
- size aligned to the alignment value.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/corrupted
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n"
- if it is corrupted (e.g., due to an interrupted volume update).
-
-What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- The amount of data this volume contains. This value makes sense
- only for static volumes, and for dynamic volume it equivalent
- to the total volume size in bytes.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/dev
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Major and minor numbers of the character device corresponding
- to this UBI volume (in <major>:<minor> format).
-
-What: /sys/class/ubi/ubiX/ubiX_Y/name
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Volume name.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Count of physical eraseblock reserved for this volume.
- Equivalent to the volume size in logical eraseblocks.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/type
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Volume type. Contains ASCII "dynamic\n" for dynamic volumes and
- "static\n" for static volumes.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Contains ASCII "0\n" if the update marker is not set for this
- volume, and "1\n" if it is set. The update marker is set when
- volume update starts, and cleaned when it ends. So the presence
- of the update marker indicates that the volume is being updated
- at the moment of the update was interrupted. The later may be
- checked using the "corrupted" sysfs file.
-
-What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size
-Date: July 2006
-KernelVersion: 2.6.22
-Contact: Artem Bityutskiy <dedekind@infradead.org>
-Description:
- Logical eraseblock size of this volume. Equivalent to logical
- eraseblock size of the device aligned on the volume alignment
- value.