--- On Thu, 19/5/11, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> wrote: > From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> > Subject: Re: Best way to create RAID-6 for swap partition - existing one failed > To: "Gavin Flower" <gavinflower@xxxxxxxxx> > Cc: linux-raid@xxxxxxxxxxxxxxx, neilb@xxxxxxx, mb@xxxxxxxxxxxxx > Date: Thursday, 19 May, 2011, 6:59 > On 5/16/2011 4:41 PM, Gavin Flower > wrote: > > > Motivation, existing RAID-6 swap partition > failed. I am thinking I should recreate it in a new > format, as currently it is 'Version : 0.90', rather than > simply rebuild it. > <snip> > > Forget using a partition. Simply use a swap > file. This example creates > a 1GB swap file in the / filesystem. You can locate > it on any > filesystem you wish. > > # swappoff -a > # dd if=/dev/zero of=/swapfile1 bs=1024 count=1048576 > # mkswap /swapfile1 > # swapon /swapfile1 > # vi /etc/fstab > Add: > /swapfile1 swap swap defaults 0 0 > > and remove your old entry for the failed swap partition. > > There is little performance difference between swap files > and swap > partitions with modern kernels. The kernel will map > the disk location > of the swap file and perform direct disk access, bypassing > the > filesystem and buffer cache. > > -- > Stan > Okay Stan, What obvious thing have I done, or not done, here? What should I do now? (I am not panicking, because I can always revert back...) I tried to implement you suggestion, # swapoff -a # dd if=/dev/zero of=/swapfile1 bs=1K count=16M 16777216+0 records in 16777216+0 records out 17179869184 bytes (17 GB) copied, 119.642 s, 144 MB/s # mkswap /swapfile1 Setting up swapspace version 1, size = 16777212 KiB no label, UUID=9afbf206-9a79-45b8-ad4b-148f71c440d7 # swapon /swapfile1 # cp /etc/fstab /etc/fstab-20110519 in /etc/fstab I replaced UUID=654f3b90-ed2c-4de6-9f2a-e2ad65fd1af1 swap swap defaults 0 0 by /swapfile1 swap swap defaults 0 0 The log message for the swapon was: May 19 11:27:38 saturn kernel: [38075.451398] Adding 16777212k swap on /swapfile1. Priority:-1 extents:159 across:24068092k However, it failed to hibernate. The log messages were: May 19 11:44:43 saturn kernel: [39043.115385] sd 1:0:0:0: [sdb] Starting disk May 19 11:44:43 saturn kernel: [39043.128453] sd 2:0:0:0: [sdc] Starting disk May 19 11:44:43 saturn kernel: [39043.140116] sd 3:0:0:0: [sdd] Starting disk May 19 11:44:43 saturn kernel: [39043.150889] sd 5:0:0:0: [sde] Starting disk May 19 11:44:43 saturn kernel: [39043.165729] PM: thaw of devices complete after 756.642 msecs May 19 11:44:43 saturn kernel: [39043.322491] PM: Saving image data pages (809839 pages) ... done May 19 11:44:43 saturn kernel: [39094.461575] PM: Wrote 3239356 kbytes in 51.13 seconds (63.35 MB/s) May 19 11:44:43 saturn kernel: [39094.465739] PM: S May 19 11:44:43 saturn kernel: [39094.482407] PM: Swap header not found! May 19 11:44:43 saturn kernel: [39094.485188] | May 19 11:44:43 saturn kernel: [39094.706731] Restarting tasks ... done. May 19 11:44:43 saturn NetworkManager[1501]: <info> wake requested (sleeping: yes enabled: yes) May 19 11:44:43 saturn NetworkManager[1501]: <info> waking up and re-enabling... May 19 11:44:43 saturn NetworkManager[1501]: <info> (eth0): now managed -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
