--- 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, 14:26 > On 5/18/2011 7:11 PM, Gavin Flower > wrote: > > We're getting pretty OT here... > > > 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 > > 17GB is a bit ridiculous for swap, especially on a single > user machine. Strictly speaking, I should have used the recommended 10GB (2GB + RAM size) to allow for hibernation. > > # 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 > > Looks good. > > > 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 > > I've never used hibernation, but a quick Google search > gives lots of > information on this. Google "linux swap file > hibernate". I read one > thread from 2008, in which folks easily solved this with a > kernel update > or switching the filesystem where they stored the swap > file. I would > think 3 years later any bugs in the hibernation code have > been squashed > and this should work flawlessly. > > What kernel/distro version are you running? Anything > recent should be > able to handle hibernation to a swap file. > > -- > Stan > Hibernation mostly worked (almost all problems were associated with the Radeon video drivers) when I was using the RAID-6 swap partition. So I was not anticipating any new problem with hibernations. I am using Fedora 14 with all the latest patches applied. $ uname -a Linux saturn 2.6.35.13-91.fc14.x86_64 #1 SMP Tue May 3 13:23:06 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux Cheers, Gavin -- 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
