Шалил Device Mapper. Глючил parted.
Через gdisk удалил раздел с /dev/mapper/6_webp2
gdisk /dev/mapper/6_web
GPT fdisk (gdisk) version 0.8.5
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): p
Disk /dev/mapper/6_web: 2357198848 sectors, 1.1 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 75A8F088-8F7F-4127-B809-F458AAE91D57
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 2357198814
Partitions will be aligned on 2048-sector boundaries
Total free space is 2239340477 sectors (1.0 TiB)
Number Start (sector) End (sector) Size Code Name
2 235720704 353579007 56.2 GiB 0700 2
Command (? for help): d 2
Using 2
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/mapper/6_web.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.
При этом:
parted /dev/mapper/6_webp2
GNU Parted 2.3
Using /dev/mapper/6_webp2
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/6_webp2: 60.3GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 60.3GB 60.3GB ext3
Device mapper её породил,
dmsetup info /dev/mapper/6_webp2
Name: 6_webp2
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 0
Event number: 0
Major, minor: 253, 2
Number of targets: 1
он же её и убьёт:
dmsetup remove /dev/mapper/6_webp2
Проверяем:
dmsetup info /dev/mapper/6_webp2
Device does not exist.
Command failed
Проверяем open count у 6_web:
dmsetup info /dev/mapper/6_web
Name: 6_web
State: ACTIVE
Read Ahead: 256
Tables present: LIVE
Open count: 0
Event number: 1
Major, minor: 253, 1
Number of targets: 1
UUID: mpath-360080e500029f9a00000142d5c51434e
А вот сюрприз:
ls /dev/mapper/ | grep 6_web
6_web 6_webp2
Но dmsetup ls говорит, что всё хорошо:
dmsetup ls
6_web (253:1)
... и прочие, не связанные с ним
