/lib/modules/2.6.33 # insmod mtd_speedtest.ko
[ 9442.280000]
[ 9442.280000] =================================================
[ 9442.280000] mtd_speedtest: MTD device: 0
[ 9442.280000] mtd_speedtest: MTD device size 81788928, eraseblock size 16384, page size 512, count of eraseblocks 4992, pages per eraseblock 32, OOB size 0
[ 9442.280000] mtd_speedtest: scanning for bad eraseblocks
[ 9442.280000] mtd_speedtest: scanned 4992 eraseblocks, 0 are bad
[ 9449.870000] mtd_speedtest: testing eraseblock write speed
[ 9497.940000] mtd_speedtest: eraseblock write speed is 1661 KiB/s
[ 9497.940000] mtd_speedtest: testing eraseblock read speed
[ 9515.630000] mtd_speedtest: eraseblock read speed is 4515 KiB/s
[ 9523.220000] mtd_speedtest: testing page write speed
[ 9571.270000] mtd_speedtest: page write speed is 1662 KiB/s
[ 9571.270000] mtd_speedtest: testing page read speed
[ 9589.130000] mtd_speedtest: page read speed is 4472 KiB/s
[ 9596.710000] mtd_speedtest: testing 2 page write speed
[ 9644.920000] mtd_speedtest: 2 page write speed is 1656 KiB/s
[ 9644.920000] mtd_speedtest: testing 2 page read speed
[ 9662.560000] mtd_speedtest: 2 page read speed is 4527 KiB/s
[ 9662.560000] mtd_speedtest: Testing erase speed
[ 9670.150000] mtd_speedtest: erase speed is 10523 KiB/s
[ 9670.150000] mtd_speedtest: finished
[ 9670.150000] =================================================


/ # ubinfo -a
UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:63
Present UBI devices:            ubi0

ubi0
Volumes count:                           1
Logical eraseblock size:                 15360 bytes, 15.0 KiB
Total amount of logical eraseblocks:     4992 (76677120 bytes, 73.1 MiB)
Amount of available logical eraseblocks: 2803 (43054080 bytes, 41.1 MiB)
Maximum count of volumes                 89
Count of bad physical eraseblocks:       0
Count of reserved physical eraseblocks:  0
Current maximum erase counter value:     1
Minimum input/output unit size:          512 bytes
Character device major/minor:            253:0
Present volumes:                         0

Volume ID:   0 (on ubi0)
Type:        dynamic
Alignment:   1
Size:        2185 LEBs (33561600 bytes, 32.0 MiB)
State:       OK
Name:        fs
Character device major/minor: 253:1
/ #

/ # df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/ubi0_0              24.2M     20.1M      4.1M  83% /mnt

/ # time mount -t ubifs /dev/ubi0_0 /mnt
[   33.370000] UBIFS: mounted UBI device 0, volume 0, name "fs"
[   33.370000] UBIFS: file system size:   33254400 bytes (32475 KiB, 31 MiB, 2165 LEBs)
[   33.370000] UBIFS: journal size:       4377600 bytes (4275 KiB, 4 MiB, 285 LEBs)
[   33.370000] UBIFS: media format:       w4/r0 (latest is w4/r0)
[   33.370000] UBIFS: default compressor: none
[   33.370000] UBIFS: reserved for root:  0 bytes (0 KiB)
real    0m 0.04s
user    0m 0.00s
sys     0m 0.04s

/ # time umount /mnt
[  105.000000] UBIFS: un-mount UBI device 0, volume 0
real    0m 0.06s
user    0m 0.01s
sys     0m 0.01s
/ #

/ # df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/ubi0_0              24.2M     20.0K     24.2M   0% /mnt

/ # umount /mnt
[  264.940000] UBIFS: un-mount UBI device 0, volume 0
/ # time mount -t ubifs /dev/ubi0_0 /mnt
[  276.270000] UBIFS: mounted UBI device 0, volume 0, name "fs"
[  276.270000] UBIFS: file system size:   33254400 bytes (32475 KiB, 31 MiB, 2165 LEBs)
[  276.270000] UBIFS: journal size:       4377600 bytes (4275 KiB, 4 MiB, 285 LEBs)
[  276.270000] UBIFS: media format:       w4/r0 (latest is w4/r0)
[  276.270000] UBIFS: default compressor: none
[  276.270000] UBIFS: reserved for root:  0 bytes (0 KiB)
real    0m 0.04s
user    0m 0.00s
sys     0m 0.04s
/ #

/ # time umount /mnt
[  289.940000] UBIFS: un-mount UBI device 0, volume 0
real    0m 0.06s
user    0m 0.01s
sys     0m 0.01s
/ #