防止文件系统重新挂载

Question

当CPU过于繁忙的时候，会导致硬盘inquery超时，从而导致重新挂载硬盘，但是这个时候是以只读的方式挂载的硬盘。
如何防止出现这种情况呢？
1.增加scsi的timeout时间？
2.修改超时的动作？
哪位大侠给提点意见。

下面是硬盘超时后的内核输出：
sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK
end_request: I/O error, dev sda, sector 709327459
Buffer I/O error on device sda7, logical block 340960253
lost page write due to I/O error on sda7
sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK
end_request: I/O error, dev sda, sector 709329031
Buffer I/O error on device sda7, logical block 340961039
lost page write due to I/O error on sda7
sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK
end_request: I/O error, dev sda, sector 709329877
Buffer I/O error on device sda7, logical block 340961462
lost page write due to I/O error on sda7
Aborting journal on device sda7.
ext3_abort called.
EXT3-fs error (device sda7): ext3_journal_start_sb: Detected aborted journal
Remounting filesystem read-only

Answer 1

回复 1# 瀚海书香
怎么没人回复啊？
难道大家都没有遇到过这个问题？

Answer 2

增加超时时间试试吧
scsi驱动里光盘和磁带机的超时时间就比较长

Answer 3

我遇到过，但是不清楚是怎么回事。在出现这个之前硬盘老是重连：
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata2.00: cmd c8/00:01:d0:fc:f3/00:00:00:00:00/e1 tag 0 dma 512 in
         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
ata2.00: status: { DRDY }
=======:1,2
ata2: hard resetting link
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 310)
#############time:5,count:1!
ata2.00: configured for UDMA/33
ata2: EH complete
#############time:5,count:1!
sd 1:0:0:0: [sda] 3907029168 512-byte hardware sectors (2000399 MB)
#############time:5,count:1!
sd 1:0:0:0: [sda] Write Protect is off
#############time:5,count:1!
#############time:5,count:1!
sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
偶尔接着出这个打印：
sd 1:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK
end_request: I/O error, dev sda, sector 30933855

经过很多次后重连失败：
ata2: exception Emask 0x10 SAct 0x0 SErr 0x90000 action 0xa frozen
ata2: irq_stat 0x00400000, PHY RDY changed
ata2: SError: { PHYRdyChg 10B8B }
ata2: hard resetting link
lib_venc.c@tl_venc_read: select time out
lib_venc.c@tl_venc_minor_read: select time out
ata2: COMRESET failed (errno=-32)
ata2: reset failed, giving up
ata2.00: disabled
ata2: EH complete
再去对硬盘进行文件检索操作的话就狂打印这个了：
sd 1:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
end_request: I/O error, dev sda, sector 238503

还请版主帮忙分析下，谢谢！