현재 쓰기가 불가능한 HDD를 다루고 있는데 그 이유를 모르겠습니다. 이 문제와 관련하여 제가 관찰한 내용은 다음과 같습니다.
읽기 전용 벤치마크를 실행하면 읽기 속도와 액세스 시간이 좋아 보입니다.
쓰기 벤치마크를 실행해도 결과가 나오지 않고 "멈춘" 것 같습니다.
디스크 포맷을 시도할 때 gparted를 포함하여 디스크에 쓰려고 하는 모든 응용 프로그램이나 프로세스는 종료될 때까지 중단됩니다. 포맷 시도 중 어느 시점에서 "/dev/sda에 쓰는 동안 입력/출력 오류가 발생했습니다."가 발생했습니다. 내가 볼 수 있는 또 다른 명백한 오류 메시지는
Buffer I/O logical block <some_number> lost during async write종료 중에 때때로 표시되는 것과 유사한 것입니다.자체 테스트의 Smartctl 출력이 괜찮아 보이는데, 이것이 물리적인 문제가 아닐 수도 있다고 믿게 됩니다.
이 명령은
fdisk -l영향을 받은 디스크에 대해 다음 출력을 반환합니다.
Device Start End Sectors Size Type
/dev/sda1 63 532542 532480 260M EFI System
/dev/sda2 532543 498340557 497808015 237,4G Microsoft basic data
/dev/sda5 498341888 1953519615 1455177728 693,9G Linux filesystem
Partition 1 does not start on physical sector boundary.
Partition 2 does not start on physical sector boundary.
GPT PMBR size mismatch (4100491 != 15701758) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.
- 방금 디스크에서 긁히는 듯한 소리가 들렸습니다.
따라서 특히 6번 항목으로 인해 HDD에 물리적 손상이 있다고 가정하지만 다시 한번 smartctl이 이를 지적해주기를 바랍니다. 불행하게도 저는 이러한 유형의 문제에 대한 경험이 없으므로 디스크가 실제로 손상되었는지 확인하기 위해 취할 수 있는 추가 진단 단계를 아는 사람이 있으면 감사하겠습니다.
\dmesg편집: 요청에 따라 쓰기 벤치마크를 실행할 때 출력을 여기에 추가하고 있습니다. 벤치마크 자체는 아래와 같이 첫 번째 샘플에서 중지됩니다.
[ 1090.321553] ata5.00: exception Emask 0x0 SAct 0x9801ffff SErr 0x50000 action 0x6 frozen
[ 1090.321562] ata5: SError: { PHYRdyChg CommWake }
[ 1090.321569] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321580] ata5.00: cmd 61/d0:00:40:0d:00/02:00:00:00:00/40 tag 0 ncq dma 368640 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321584] ata5.00: status: { DRDY }
[ 1090.321588] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321598] ata5.00: cmd 61/40:08:10:10:00/05:00:00:00:00/40 tag 1 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321602] ata5.00: status: { DRDY }
[ 1090.321605] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321614] ata5.00: cmd 61/c8:10:50:15:00/02:00:00:00:00/40 tag 2 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321618] ata5.00: status: { DRDY }
[ 1090.321622] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321630] ata5.00: cmd 61/48:18:18:18:00/05:00:00:00:00/40 tag 3 ncq dma 692224 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321634] ata5.00: status: { DRDY }
[ 1090.321638] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321646] ata5.00: cmd 61/c0:20:60:1d:00/02:00:00:00:00/40 tag 4 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321650] ata5.00: status: { DRDY }
[ 1090.321654] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321662] ata5.00: cmd 61/48:28:20:20:00/05:00:00:00:00/40 tag 5 ncq dma 692224 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321666] ata5.00: status: { DRDY }
[ 1090.321670] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321678] ata5.00: cmd 61/c0:30:68:25:00/02:00:00:00:00/40 tag 6 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321682] ata5.00: status: { DRDY }
[ 1090.321686] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321694] ata5.00: cmd 61/40:38:28:28:00/05:00:00:00:00/40 tag 7 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321698] ata5.00: status: { DRDY }
[ 1090.321701] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321710] ata5.00: cmd 61/c0:40:68:2d:00/02:00:00:00:00/40 tag 8 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321714] ata5.00: status: { DRDY }
[ 1090.321717] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321726] ata5.00: cmd 61/40:48:28:30:00/05:00:00:00:00/40 tag 9 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321730] ata5.00: status: { DRDY }
[ 1090.321733] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321742] ata5.00: cmd 61/c8:50:68:35:00/02:00:00:00:00/40 tag 10 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321746] ata5.00: status: { DRDY }
[ 1090.321749] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321758] ata5.00: cmd 61/40:58:30:38:00/05:00:00:00:00/40 tag 11 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321762] ata5.00: status: { DRDY }
[ 1090.321765] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321774] ata5.00: cmd 61/c0:60:70:3d:00/02:00:00:00:00/40 tag 12 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321778] ata5.00: status: { DRDY }
[ 1090.321781] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321790] ata5.00: cmd 61/40:68:30:40:00/05:00:00:00:00/40 tag 13 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321794] ata5.00: status: { DRDY }
[ 1090.321797] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321806] ata5.00: cmd 61/c8:70:70:45:00/02:00:00:00:00/40 tag 14 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321810] ata5.00: status: { DRDY }
[ 1090.321813] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321822] ata5.00: cmd 61/48:78:38:48:00/05:00:00:00:00/40 tag 15 ncq dma 692224 out
res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321826] ata5.00: status: { DRDY }
[ 1090.321829] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321838] ata5.00: cmd 61/80:80:80:4d:00/02:00:00:00:00/40 tag 16 ncq dma 327680 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321841] ata5.00: status: { DRDY }
[ 1090.321845] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321854] ata5.00: cmd 61/40:d8:00:00:00/05:00:00:00:00/40 tag 27 ncq dma 688128 out
res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321858] ata5.00: status: { DRDY }
[ 1090.321861] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321870] ata5.00: cmd 61/c0:e0:40:05:00/02:00:00:00:00/40 tag 28 ncq dma 360448 out
res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321874] ata5.00: status: { DRDY }
[ 1090.321877] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1090.321886] ata5.00: cmd 61/40:f8:00:08:00/05:00:00:00:00/40 tag 31 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1090.321890] ata5.00: status: { DRDY }
[ 1090.321896] ata5: hard resetting link
[ 1090.636674] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1090.646800] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1090.646806] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1090.646811] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1090.651025] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1090.651032] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1090.651036] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1090.652207] ata5.00: configured for UDMA/100
[ 1090.652755] ata5: EH complete
[ 1121.030386] ata5.00: exception Emask 0x0 SAct 0xfcfffc SErr 0x40000 action 0x6 frozen
[ 1121.030399] ata5: SError: { CommWake }
[ 1121.030408] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030425] ata5.00: cmd 61/40:10:00:08:00/05:00:00:00:00/40 tag 2 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030430] ata5.00: status: { DRDY }
[ 1121.030436] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030451] ata5.00: cmd 61/c0:18:40:05:00/02:00:00:00:00/40 tag 3 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030457] ata5.00: status: { DRDY }
[ 1121.030462] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030471] ata5.00: cmd 61/40:20:00:00:00/05:00:00:00:00/40 tag 4 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030475] ata5.00: status: { DRDY }
[ 1121.030479] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030488] ata5.00: cmd 61/80:28:80:4d:00/02:00:00:00:00/40 tag 5 ncq dma 327680 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030491] ata5.00: status: { DRDY }
[ 1121.030495] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030504] ata5.00: cmd 61/48:30:38:48:00/05:00:00:00:00/40 tag 6 ncq dma 692224 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030507] ata5.00: status: { DRDY }
[ 1121.030511] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030520] ata5.00: cmd 61/c8:38:70:45:00/02:00:00:00:00/40 tag 7 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030523] ata5.00: status: { DRDY }
[ 1121.030527] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030535] ata5.00: cmd 61/40:40:30:40:00/05:00:00:00:00/40 tag 8 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030539] ata5.00: status: { DRDY }
[ 1121.030543] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030551] ata5.00: cmd 61/c0:48:70:3d:00/02:00:00:00:00/40 tag 9 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030555] ata5.00: status: { DRDY }
[ 1121.030558] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030568] ata5.00: cmd 61/40:50:30:38:00/05:00:00:00:00/40 tag 10 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030571] ata5.00: status: { DRDY }
[ 1121.030575] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030584] ata5.00: cmd 61/c8:58:68:35:00/02:00:00:00:00/40 tag 11 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030587] ata5.00: status: { DRDY }
[ 1121.030591] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030600] ata5.00: cmd 61/40:60:28:30:00/05:00:00:00:00/40 tag 12 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030603] ata5.00: status: { DRDY }
[ 1121.030607] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030616] ata5.00: cmd 61/c0:68:68:2d:00/02:00:00:00:00/40 tag 13 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030619] ata5.00: status: { DRDY }
[ 1121.030623] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030632] ata5.00: cmd 61/40:70:28:28:00/05:00:00:00:00/40 tag 14 ncq dma 688128 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030635] ata5.00: status: { DRDY }
[ 1121.030639] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030648] ata5.00: cmd 61/c0:78:68:25:00/02:00:00:00:00/40 tag 15 ncq dma 360448 out
res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030651] ata5.00: status: { DRDY }
[ 1121.030655] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030664] ata5.00: cmd 61/48:90:20:20:00/05:00:00:00:00/40 tag 18 ncq dma 692224 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030667] ata5.00: status: { DRDY }
[ 1121.030671] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030680] ata5.00: cmd 61/c0:98:60:1d:00/02:00:00:00:00/40 tag 19 ncq dma 360448 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030683] ata5.00: status: { DRDY }
[ 1121.030687] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030696] ata5.00: cmd 61/48:a0:18:18:00/05:00:00:00:00/40 tag 20 ncq dma 692224 out
res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030699] ata5.00: status: { DRDY }
[ 1121.030703] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030712] ata5.00: cmd 61/c8:a8:50:15:00/02:00:00:00:00/40 tag 21 ncq dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030715] ata5.00: status: { DRDY }
[ 1121.030719] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030728] ata5.00: cmd 61/40:b0:10:10:00/05:00:00:00:00/40 tag 22 ncq dma 688128 out
res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030731] ata5.00: status: { DRDY }
[ 1121.030735] ata5.00: failed command: WRITE FPDMA QUEUED
[ 1121.030743] ata5.00: cmd 61/d0:b8:40:0d:00/02:00:00:00:00/40 tag 23 ncq dma 368640 out
res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1121.030747] ata5.00: status: { DRDY }
[ 1121.030753] ata5: hard resetting link
[ 1121.345937] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1121.358873] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1121.358880] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1121.358884] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1121.363203] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1121.363209] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1121.363214] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1121.364412] ata5.00: configured for UDMA/100
[ 1121.364968] ata5: EH complete
[ 1209.075840] INFO: task gnome-disks:8463 blocked for more than 120 seconds.
[ 1209.075852] Tainted: P OE 5.4.0-153-generic #170-Ubuntu
[ 1209.075854] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1209.075858] gnome-disks D 0 8463 2344 0x00004000
[ 1209.075863] Call Trace:
[ 1209.075878] __schedule+0x2e3/0x740
[ 1209.075885] schedule+0x42/0xb0
[ 1209.075891] io_schedule+0x16/0x40
[ 1209.075899] __blkdev_direct_IO+0x353/0x450
[ 1209.075906] ? check_preempt_curr+0x4e/0x90
[ 1209.075911] blkdev_direct_IO+0x4d/0x70
[ 1209.075919] generic_file_direct_write+0x9c/0x170
[ 1209.075926] __generic_file_write_iter+0xbc/0x1d0
[ 1209.075931] blkdev_write_iter+0xb8/0x160
[ 1209.075940] new_sync_write+0x125/0x1c0
[ 1209.075949] __vfs_write+0x29/0x40
[ 1209.075952] vfs_write+0xb9/0x1a0
[ 1209.075957] ksys_write+0x67/0xe0
[ 1209.075962] __x64_sys_write+0x1a/0x20
[ 1209.075975] do_syscall_64+0x57/0x190
[ 1209.075980] entry_SYSCALL_64_after_hwframe+0x5c/0xc1
[ 1209.075984] RIP: 0033:0x7efc3d2f132f
[ 1209.075992] Code: Bad RIP value.
[ 1209.075995] RSP: 002b:00007efc32dc59a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[ 1209.075999] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efc3d2f132f
[ 1209.076002] RDX: 0000000000a00000 RSI: 00007efc313c4000 RDI: 000000000000000b
[ 1209.076004] RBP: 000055a1a5d5d010 R08: 0000000000000000 R09: 0000000000000423
[ 1209.076005] R10: 00007ffdf2cc2090 R11: 0000000000000293 R12: 000000000000000b
[ 1209.076007] R13: 00007efc313c4000 R14: 0000000000001000 R15: 00007efc32dc5a50
[ 1213.183836] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x40000 action 0x6 frozen
[ 1213.183845] ata5: SError: { CommWake }
[ 1213.183852] ata5.00: failed command: WRITE DMA EXT
[ 1213.183865] ata5.00: cmd 35/00:c8:68:35:00/00:02:00:00:00/e0 tag 17 dma 364544 out
res 40/00:ff:ff:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1213.183869] ata5.00: status: { DRDY }
[ 1213.183876] ata5: hard resetting link
[ 1213.498788] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1213.501523] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1213.501530] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1213.501534] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1213.505634] ata5.00: ACPI cmd ef/10:06:00:00:00:00 (SET FEATURES) succeeded
[ 1213.505640] ata5.00: ACPI cmd f5/00:00:00:00:00:00 (SECURITY FREEZE LOCK) filtered out
[ 1213.505645] ata5.00: ACPI cmd b1/c1:00:00:00:00:00 (DEVICE CONFIGURATION OVERLAY) filtered out
[ 1213.506879] ata5.00: configured for UDMA/100
[ 1213.507257] ata5: EH complete
벤치마크가 첫 번째 샘플에서 중단되었습니다.
답변1
위
dmesg출력을 보면 하드 드라이브가 손상되어 복구할 수 없음이 분명합니다(소프트웨어 측면에서).그 안에 데이터가 필요하다고 가정하면 이제 데이터 조작을 중단하는 것이 좋습니다.
데이터가 정말로 필요한 경우 평판이 좋은 복구 회사에 문의하고 비용이 많이 들 수 있다는 점에 대비하십시오.
데이터가 필요하지 않으면 덤프에 버리세요.
나는 당신의 결정이 좀 더 명확해지기를 바랍니다.