root@am437x-evm:~# ubiformat /dev/mtd6 ubiformat: mtd6 (nor), size 57475072 bytes (54.8 MiB), 877 eraseblocks of 65536 bytes (64.0 KiB), min. I/O size 1 bytes libscan: scanning eraseblock 876 -- 100 % complete ubiformat: 877 eraseblocks have valid erase counter, mean value is 5 ubiformat: formatting eraseblock 876 -- 100 % complete root@am437x-evm:~# ubiattach -p /dev/mtd6 [ 587.639067] ubi0: attaching mtd6 [ 587.826672] ubi0: scanning is finished [ 587.848277] ubi0: attached mtd6 (name "QSPI.FILESYSTEM", size 54 MiB) [ 587.857099] ubi0: PEB size: 65536 bytes (64 KiB), LEB size: 65408 bytes [ 587.867016] ubi0: min./max. I/O unit sizes: 1/256, sub-page size 1 [ 587.875147] ubi0: VID header offset: 64 (aligned 64), data offset: 128 [ 587.881719] ubi0: good PEBs: 877, bad PEBs: 0, corrupted PEBs: 0 [ 587.890788] ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128 [ 587.899822] ubi0: max/mean erase counter: 12/6, WL threshold: 4096, image sequence number: 11548538 [ 587.910815] ubi0: available PEBs: 873, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 [ 587.921814] ubi0: background thread "ubi_bgt0d" started, PID 867 UBI device number 0, total 877 LEBs (57362816 bytes, 54.7 MiB), available 873 LEBs (57101184 bytes, 54.5 MiB), LEB size 65408 bytes () root@am437x-evm:~# ubimkvol /dev/ubi0 -N rootfs -s 54MiB [ 630.667486] ------------[ cut here ]------------ [ 630.680210] WARNING: CPU: 0 PID: 868 at /home/gtbldadm/processor-sdk-linux-morty-build/build-CORTEX_1/arago-tmp-external-linaro-to8 [ 630.711763] Writing at offset 64 into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.[ : bc_example(O) pru_rproc pruss_intc xhci_plat_hcd xhci_hcd usbcore pruss dwc3 udc_core usb_common sha512_generic sha512_arm sha256_ge) [ 630.789399] CPU: 0 PID: 868 Comm: ubimkvol Tainted: G O 4.9.28-geed43d1050 #1 [ 630.802103] Hardware name: Generic AM43 (Flattened Device Tree) [ 630.808079] Backtrace: [ 630.810613] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 630.836990] r7:00000009 r6:00000000 r5:c09e7db4 r4:ee449b18 [ 630.848146] [] (show_stack) from [] (dump_stack+0x24/0x28) [ 630.862694] [] (dump_stack) from [] (__warn+0xe8/0x100) [ 630.869735] [] (__warn) from [] (warn_slowpath_fmt+0x40/0x48) [ 630.882388] r9:ee3713c0 r8:ee449c08 r7:00000040 r6:ee8e9c18 r5:00000000 r4:c09e7ec0 [ 630.890245] [] (warn_slowpath_fmt) from [] (spi_nor_write+0x13c/0x1b8) [ 630.905510] r3:00000040 r2:c09e7ec0 [ 630.909133] r4:00000040 [ 630.911749] [] (spi_nor_write) from [] (part_write+0x48/0x50) [ 630.923798] r10:f23ac000 r9:ee3713c0 r8:00000000 r7:00000000 r6:00000040 r5:00000000 [ 630.931693] r4:00930000 [ 630.944824] [] (part_write) from [] (mtd_write+0x88/0xa0) [ 630.953649] r5:00000000 r4:c0553820 [ 630.957275] [] (mtd_write) from [] (ubi_io_write+0x100/0x68c) [ 630.968364] r7:00000112 r6:00000040 r5:00000040 r4:ee544000 [ 630.975659] [] (ubi_io_write) from [] (ubi_io_write_vid_hdr+0xe4/0x128) [ 630.985552] r10:f23ac000 r9:00000000 r8:7fffefff r7:ee3713c0 r6:00000112 r5:ee544000 [ 630.994954] r4:ee3713c0 [ 630.997532] [] (ubi_io_write_vid_hdr) from [] (try_write_vid_and_data+0x54/0x190) [ 631.009248] r7:00000000 r6:eea77800 r5:00000112 r4:ee544000 [ 631.016472] [] (try_write_vid_and_data) from [] (ubi_eba_atomic_leb_change+0x18c/0x2c0) [ 631.027795] r10:eea77800 r9:00000000 r8:ee544414 r7:ee371440 r6:ee3713c0 r5:00000004 [ 631.037176] r4:ee544000 [ 631.039766] [] (ubi_eba_atomic_leb_change) from [] (ubi_update_layout_vol+0x44/0x5c) [ 631.051753] r10:ee3995f4 r9:ee544000 r8:ee399400 r7:00000000 r6:eea77800 r5:00000001 [ 631.061118] r4:ee544000 [ 631.065178] [] (ubi_update_layout_vol) from [] (ubi_change_vtbl_record+0x64/0xe8) [ 631.076075] r6:00000000 r5:ee449d44 r4:ee544000 [ 631.080751] [] (ubi_change_vtbl_record) from [] (ubi_create_volume+0x57c/0x63c) [ 631.092412] r7:00000000 r6:00000000 r5:ee544000 r4:0f200001 [ 631.098138] [] (ubi_create_volume) from [] (ubi_cdev_ioctl+0x3e4/0x9dc) [ 631.109003] r10:00000000 r9:bec82950 r8:bec82950 r7:00000003 r6:ee449e38 r5:ee544000 [ 631.118366] r4:ee5443f4 [ 631.120951] [] (ubi_cdev_ioctl) from [] (do_vfs_ioctl+0xa8/0x980) [ 631.131267] r10:00000000 r9:ee448000 r8:bec82950 r7:00000003 r6:ee4f7b40 r5:ee3ac730 [ 631.140647] r4:bec82950 [ 631.144671] [] (do_vfs_ioctl) from [] (SyS_ioctl+0x3c/0x64) [ 631.153536] r10:00000000 r9:ee448000 r8:bec82950 r7:40986f00 r6:ee4f7b40 r5:00000003 [ 631.161409] r4:ee4f7b40 [ 631.166440] [] (SyS_ioctl) from [] (ret_fast_syscall+0x0/0x3c) [ 631.175559] r9:ee448000 r8:c0107e84 r7:00000036 r6:00000003 r5:00000006 r4:bec82a10 [ 631.184898] ---[ end trace 8609e11da688cbea ]--- Volume ID 0, size 866 LEBs (56643328 bytes, 54.0 MiB), LEB size 65408 bytes (63.9 KiB), dynamic, name "rootfs", alignment 1