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社区首页 >问答首页 >删除快照使文件系统只读

问删除快照使文件系统只读
EN

Ask Ubuntu用户
提问于 2014-05-20 08:49:42
回答 1查看 470关注 0票数 0

我使用Btrfs 3.12，每次删除快照时，整个btrfs卷都变成“只读”。所以我想试一试

代码语言：javascript
复制
btrfsck --repair

但每次在这条线上失败：

代码语言：javascript
复制
Extent back ref already exists for 4788162379776 parent 0 root 258
Extent back ref already exists for 4788162789376 parent 0 root 258
Abandon (core dumped)

这是结果dsmeg (最后一行，因为有吨)

代码语言：javascript
复制
 scsi 6:0:0:0: Direct-Access     EQLOGIC  100E-00          7.0  PQ: 0 ANSI: 5     
 sd 5:0:0:0: Attached scsi generic sg9 type 0     
 sd 6:0:0:0: Attached scsi generic sg10 type 0     
 sd 5:0:0:0: [sde] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 6:0:0:0: [sdf] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 10:0:0:0: [sdd] Write Protect is off     
 sd 10:0:0:0: [sdd] Mode Sense: 81 00 00 00     
 sd 9:0:0:0: [sdc] Write Protect is off     
 sd 9:0:0:0: [sdc] Mode Sense: 81 00 00 00     
 sd 10:0:0:0: [sdd] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 9:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 6:0:0:0: [sdf] Write Protect is off     
 sd 6:0:0:0: [sdf] Mode Sense: 81 00 00 00     
 sd 5:0:0:0: [sde] Write Protect is off     
 sd 5:0:0:0: [sde] Mode Sense: 81 00 00 00     
 sd 6:0:0:0: [sdf] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 9:0:0:0: [sdc] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 5:0:0:0: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 10:0:0:0: [sdd] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 5:0:0:0: [sde] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 6:0:0:0: [sdf] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 scsi 7:0:0:0: Direct-Access     EQLOGIC  100E-00          7.0  PQ: 0 ANSI: 5     
 sd 7:0:0:0: Attached scsi generic sg11 type 0     
 sd 7:0:0:0: [sdg] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
 scsi 8:0:0:0: Direct-Access     EQLOGIC  100E-00          7.0  PQ: 0 ANSI: 5     
 sd 8:0:0:0: Attached scsi generic sg12 type 0     
 sd 7:0:0:0: [sdg] Write Protect is off     
 sd 7:0:0:0: [sdg] Mode Sense: 81 00 00 00     
 sd 7:0:0:0: [sdg] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 8:0:0:0: [sdh] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
 sd 7:0:0:0: [sdg] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
 sd 8:0:0:0: [sdh] Write Protect is off     
 sd 8:0:0:0: [sdh] Mode Sense: 81 00 00 00     
 sd 8:0:0:0: [sdh] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA     
 sd 8:0:0:0: [sdh] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
  sdg: sdg1     
  sdh: sdh1     
 sd 8:0:0:0: [sdh] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
 sd 7:0:0:0: [sdg] 348967680 4096-byte logical blocks: (1.42 TB/1.29 TiB)     
 sd 8:0:0:0: [sdh] Attached SCSI disk     
 sd 7:0:0:0: [sdg] Attached SCSI disk     
  sde: unknown partition table     
  sdf: unknown partition table     
 sd 5:0:0:0: [sde] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 6:0:0:0: [sdf] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 5:0:0:0: [sde] Attached SCSI disk     
 sd 6:0:0:0: [sdf] Attached SCSI disk     
  sdd: unknown partition table     
  sdc: unknown partition table     
 sd 9:0:0:0: [sdc] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 10:0:0:0: [sdd] 2684355840 4096-byte logical blocks: (10.9 TB/10.0 TiB)     
 sd 9:0:0:0: [sdc] Attached SCSI disk     
 sd 10:0:0:0: [sdd] Attached SCSI disk     
 device-mapper: multipath round-robin: version 1.0.0 loaded     
 bio: create slab <bio-2> at 2     
 bio: create slab <bio-3> at 3     
 btrfs: device fsid dd26758b-a689-46a8-b4da-b5ecc07d73b6 devid 1 transid 135638 /dev/dm-0     
 btrfs: device fsid dd26758b-a689-46a8-b4da-b5ecc07d73b6 devid 2 transid 135638 /dev/dm-1     
 btrfs: device fsid dd26758b-a689-46a8-b4da-b5ecc07d73b6 devid 2 transid 135638 /dev/dm-1     
 btrfs: device fsid dd26758b-a689-46a8-b4da-b5ecc07d73b6 devid 1 transid 135638 /dev/dm-0     
 btrfs: device fsid dd26758b-a689-46a8-b4da-b5ecc07d73b6 devid 2 transid 135638 /dev/dm-1     
 perf samples too long (2511 > 2500), lowering kernel.perf_event_max_sample_rate to 50000     
 show_signal_msg: 81 callbacks suppressed     
 btrfsck[2604]: segfault at 0 ip 000000000041243a sp 00007fffe6793e40 error 6 in btrfsck[400000+53000]

我还找到了一个文件:/var/crash/_sbin_btrfsck.0.崩溃是行的末尾：

代码语言：javascript
复制
  7f127eb34000-7f127eb36000 rw-p 00000000 00:00 0          
  7f127eb36000-7f127eb37000 r--p 00022000 08:11 5374145                    /lib/x86_64-linux-gnu/ld-2.15.so          
  7f127eb37000-7f127eb39000 rw-p 00023000 08:11 5374145                    /lib/x86_64-linux-gnu/ld-2.15.so          
  7fffd36b4000-7fffd36d5000 rw-p 00000000 00:00 0                          [stack]          
  7fffd378c000-7fffd378e000 r-xp 00000000 00:00 0                          [vdso]          
  ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]          
 ProcStatus:          
  Name:  btrfsck          
  State: S (sleeping)          
  Tgid:  9512          
  Ngid:  0          
  Pid:   9512          
  PPid:  5436          
  TracerPid:     0          
  Uid:   0       0       0       0          
  Gid:   0       0       0       0          
  FDSize:        256          
  Groups:        0          
  VmPeak:         8855944 kB          
  VmSize:         8855944 kB          
  VmLck:        0 kB          
  VmPin:        0 kB          
  VmHWM:  7644076 kB          
  VmRSS:  7432256 kB          
  VmData:         8835640 kB          
  VmStk:      136 kB          
  VmExe:      332 kB          
  VmLib:     3364 kB          
  VmPTE:    17324 kB          
  VmSwap:         1404244 kB          
  Threads:       1          
  SigQ:  1/63594          
  SigPnd:        0000000000000000          
  ShdPnd:        0000000000000000          
  SigBlk:        0000000000000000          
  SigIgn:        0000000000000000          
  SigCgt:        0000000180000000          
  CapInh:        0000000000000000          
  CapPrm:        0000001fffffffff          
  CapEff:        0000001fffffffff          
  CapBnd:        0000001fffffffff          
  Seccomp:       0          
  Cpus_allowed:  ffffffff          
  Cpus_allowed_list:     0-31          
  Mems_allowed:  00000000,00000001          
  Mems_allowed_list:     0          
  voluntary_ctxt_switches:       77639          
  nonvoluntary_ctxt_switches:    377681          
 Signal: 6          
 Uname: Linux 3.13.0-031300-generic x86_64

致以敬意，

kernel
btrfs
EN

回答 1

Ask Ubuntu用户

发布于 2014-05-21 10:08:38

你们遇到了两个问题，不一定要互相关联。

  • 每次删除快照时，整个btrfs卷都变成“只读”。

dmesg没有给出任何这方面的线索。

  • btrfsck --repair与信号6(如.crash文件中提到的)崩溃

这是个窃听器。

票数 0
EN
页面原文内容由Ask Ubuntu提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://askubuntu.com/questions/469506

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