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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 | 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. |