I have a brand new 2T external Samsung SSD disk. (two of them) for backup. I tried the first one and had an issue, I tried the second one and got the same issue. Am I doing something wrong ? I find it hard to believe the SSD (both) are bad. I plugged in the USB 3.1 adapter, I fdisk /dev/sdd, n, p, default, default, w. then mkfs.ext4 -j /dev/sdd1, then just mount and rsync. [ 1085.193710] [<ffffffffa94dca7e>] ? account_entity_dequeue+0xae/0xd0 [ 1085.193715] [<ffffffffa9b67c49>] schedule+0x29/0x70 [ 1085.193719] [<ffffffffa9b65721>] schedule_timeout+0x221/0x2d0 [ 1085.193724] [<ffffffffa942a621>] ? __switch_to+0x151/0x580 [ 1085.193730] [<ffffffffa9501052>] ? ktime_get_ts64+0x52/0xf0 [ 1085.193735] [<ffffffffa9b672ed>] io_schedule_timeout+0xad/0x130 [ 1085.193740] [<ffffffffa94c2886>] ? prepare_to_wait_exclusive+0x56/0x90 [ 1085.193744] [<ffffffffa9b67388>] io_schedule+0x18/0x20 [ 1085.193750] [<ffffffffa9743de3>] get_request+0x243/0x7d0 [ 1085.193756] [<ffffffffa977c401>] ? __radix_tree_create+0x11/0x360 [ 1085.193761] [<ffffffffa94c2d00>] ? wake_up_atomic_t+0x30/0x30 [ 1085.193767] [<ffffffffa9746cae>] blk_queue_bio+0xfe/0x400 [ 1085.193772] [<ffffffffa9744ef7>] generic_make_request+0x147/0x380 [ 1085.193778] [<ffffffffa97451a0>] submit_bio+0x70/0x150 [ 1085.193786] [<ffffffffa967e555>] ? bio_alloc_bioset+0x115/0x310 [ 1085.193791] [<ffffffffa967a197>] _submit_bh+0x127/0x160 [ 1085.193797] [<ffffffffa967a1e0>] submit_bh+0x10/0x20 [ 1085.193808] [<ffffffffc1bd8424>] ext4_read_block_bitmap_nowait+0x4c4/0x640 [ext4] [ 1085.193828] [<ffffffffc1c16641>] ext4_mb_init_cache+0x181/0x6e0 [ext4] [ 1085.193834] [<ffffffffa95c5afe>] ? lru_cache_add+0xe/0x10 [ 1085.193840] [<ffffffffa95b74de>] ? find_or_create_page+0x5e/0xa0 [ 1085.193858] [<ffffffffc1c16cc6>] ext4_mb_init_group+0x126/0x230 [ext4] [ 1085.193874] [<ffffffffc1c16f54>] ext4_mb_good_group+0x184/0x1a0 [ext4] [ 1085.193889] [<ffffffffc1c19735>] ext4_mb_regular_allocator+0x1c5/0x470 [ext4] [ 1085.193906] [<ffffffffc1c12d0c>] ? __ext4_journal_stop+0x3c/0xb0 [ext4] [ 1085.193921] [<ffffffffc1c14bec>] ? ext4_mb_normalize_request+0x20c/0x560 [ext4] [ 1085.193936] [<ffffffffc1c1b59b>] ext4_mb_new_blocks+0x65b/0xa20 [ext4] [ 1085.193942] [<ffffffffa967918d>] ? __getblk+0x2d/0x300 [ 1085.193961] [<ffffffffc1c223cb>] ext4_ind_map_blocks+0xb9b/0xc20 [ext4] [ 1085.193968] [<ffffffffa94c6258>] ? hrtimer_cancel+0x28/0x40 [ 1085.193973] [<ffffffffa95d82c8>] ? zone_statistics+0x88/0xa0 [ 1085.193987] [<ffffffffc1bdfd35>] ext4_map_blocks+0x295/0x6e0 [ext4] [ 1085.193993] [<ffffffffa9657c7e>] ? do_select+0x73e/0x7c0 [ 1085.193999] [<ffffffffa961c0b2>] ? kmem_cache_alloc+0x1c2/0x1f0 [ 1085.194006] [<ffffffffa96787b1>] ? alloc_buffer_head+0x21/0x60 [ 1085.194018] [<ffffffffc1be035f>] _ext4_get_block+0x1df/0x220 [ext4] [ 1085.194030] [<ffffffffc1be03b6>] ext4_get_block+0x16/0x20 [ext4] [ 1085.194036] [<ffffffffa967ae78>] __block_write_begin_int+0x198/0x5f0 [ 1085.194041] [<ffffffffa961c0b2>] ? kmem_cache_alloc+0x1c2/0x1f0 [ 1085.194053] [<ffffffffc1be03a0>] ? _ext4_get_block+0x220/0x220 [ext4] [ 1085.194067] [<ffffffffc1be4c56>] ? ext4_write_begin+0x116/0x440 [ext4] [ 1085.194073] [<ffffffffa967b2e1>] __block_write_begin+0x11/0x20 [ 1085.194085] [<ffffffffc1be4ccf>] ext4_write_begin+0x18f/0x440 [ext4] [ 1085.194091] [<ffffffffa95b5f84>] generic_file_buffered_write+0x124/0x2c0 [ 1085.194098] [<ffffffffa95b88c2>] __generic_file_aio_write+0x1e2/0x400 [ 1085.194105] [<ffffffffa95b8b39>] generic_file_aio_write+0x59/0xa0 [ 1085.194116] [<ffffffffc1bda322>] ext4_file_write+0xd2/0x1e0 [ext4] [ 1085.194121] [<ffffffffa9640823>] do_sync_write+0x93/0xe0 [ 1085.194127] [<ffffffffa9641310>] vfs_write+0xc0/0x1f0 [ 1085.194132] [<ffffffffa964212f>] SyS_write+0x7f/0xf0 [ 1085.194138] [<ffffffffa9b74ddb>] system_call_fastpath+0x22/0x27 Thanks, Jerry _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos