需要有关 Linux 主机的文件系统进入只读模式的任何提示

Question

我有一个在 XEN (Citrix) 服务器上运行的 CentOS 5.x Linux 客户机，它有时会神秘地进入只读模式。

我已经检查了文件系统是否有错误，没有出现任何可疑的情况...... :(

系统日志是这样写的：

Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735103
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735191
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735279
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735359
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735447
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735535
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735103
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 309735103
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 307662855
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 315316647
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 315316655
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 315316663
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 315316671
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 315316735
Mar  5 10:57:16 testsrv last message repeated 38 times
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 307662855
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 262717023
Mar  5 10:57:16 testsrv last message repeated 2 times
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 258482255
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 141041743
Mar  5 10:57:16 testsrv kernel: EXT3-fs error (device xvdb1): ext3_find_entry: reading directory #17629185 offset 0
Mar  5 10:57:16 testsrv kernel: Aborting journal on device xvdb1.
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 16519
Mar  5 10:57:16 testsrv kernel: Buffer I/O error on device xvdb1, logical block 2057
Mar  5 10:57:16 testsrv kernel: lost page write due to I/O error on xvdb1
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 63
Mar  5 10:57:16 testsrv kernel: Buffer I/O error on device xvdb1, logical block 0
Mar  5 10:57:16 testsrv kernel: lost page write due to I/O error on xvdb1
Mar  5 10:57:16 testsrv kernel: end_request: I/O error, dev xvdb, sector 59692223
Mar  5 10:57:16 testsrv last message repeated 33 times
Mar  5 10:57:16 testsrv kernel: ext3_abort called.
Mar  5 10:57:16 testsrv kernel: EXT3-fs error (device xvdb1): ext3_journal_start_sb: Detected aborted journal
Mar  5 10:57:16 testsrv kernel: Remounting filesystem read-only

Answer 1

@DejanLekic：tune2fs等只扫描文件系统是否有错误。您观察到的内核错误消息与硬件故障有关，它位于文件系统之下的一层。现代文件系统和操作系统非常重视硬件故障；ext* 将自身重新挂载为只读以防止任何写访问造成进一步损坏，XFS 将自身完全关闭等等。

所以你有某种硬件问题。错误的 RAID 控制器、死硬盘、不可靠的 SAN 等等。