我们的 FreeNAS 服务器日志不断被填满
Apr 5 15:13:49 Wheelhouse NAS kernel: swap_pager: I/O error - pagein failed; blkno 524312,size 4096, error 6
Apr 5 15:13:49 Wheelhouse NAS kernel: vm_fault: pager read error, pid 1 (init)
Apr 5 15:13:49 Wheelhouse NAS kernel: swap_pager: I/O error - pagein failed; blkno 524312,size 4096, error 6
Apr 5 15:13:49 Wheelhouse NAS kernel: vm_fault: pager read error, pid 1 (init)
Apr 5 15:13:49 Wheelhouse NAS kernel: swap_pager: I/O error - pagein failed; blkno 524312,size 4096, error 6
Apr 5 15:13:49 Wheelhouse NAS kernel: vm_fault: pager read error, pid 1 (init)
Apr 5 15:13:49 Wheelhouse NAS kernel: swap_pager: I/O error - pagein failed; blkno 524312,size 4096, error 6
等等。
我们可以做什么？
/var已经满了，/var/log占了“109%”！我能以某种方式停止记录吗？
我们目前正在更换其中一个 RAIDZ 中的损坏驱动器......
> zpool status
pool: raid-5x3
state: ONLINE
scrub: scrub completed after 15h52m with 0 errors on Sun Mar 30 13:52:46 2014
config:
NAME STATE READ WRITE CKSUM
raid-5x3 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
ada5p2 ONLINE 0 0 0
gptid/a767b8ef-1c95-11e2-af4c-f46d049aaeca ONLINE 0 0 0
ada8p2 ONLINE 0 0 0
ada10p2 ONLINE 0 0 0
ada7p2 ONLINE 0 0 0
errors: No known data errors
pool: raid2
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scrub: resilver in progress for 0h57m, 4.48% done, 20h24m to go
config:
NAME STATE READ WRITE CKSUM
raid2 DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
gptid/5f3c0517-3ff2-11e2-9437-f46d049aaeca ONLINE 0 0 0
replacing DEGRADED 0 0 0
gptid/5fe33556-3ff2-11e2-9437-f46d049aaeca UNAVAIL 0 0 0 cannot open
ada0 ONLINE 0 0 0 113G resilvered
gptid/60570005-3ff2-11e2-9437-f46d049aaeca ONLINE 0 0 0
gptid/60ebeaa5-3ff2-11e2-9437-f46d049aaeca ONLINE 0 0 0
gptid/61925b86-3ff2-11e2-9437-f46d049aaeca ONLINE 0 0 0
errors: No known data errors
答案1
看起来，发生的情况是，坏驱动器不仅是 RAIDZ 的一部分，而且还包含一个交换分区，该分区不仅处于活动状态，而且实际上还包含一些已交换到其中的内容。
FreeNAS 在添加驱动器时默认创建交换分区，这实际上可能是一个可靠性问题，因为交换没有冗余，如果你最终将数据交换出去的话。请参阅https://bugs.freenas.org/issues/208对此进行一些讨论。
在我看来，您可能需要在此之后重新启动才能恢复已知的良好状态，因为丢失的交换页面保存了哪些数据并不十分清楚。