Re: Installed kernel crash on T5120
On Tue, Jul 17, 2018 at 03:04:18PM +0200, Romain Dolbeau wrote:
> Well I have ZFS up and running from Git - it has become surprisingly
> easy over the years.
> BTW, from the archive, I see you were intent on RAIDZ. I love RAIDZ,
> but after running the raidz benchmark, I strongly advise against
> anything but mirrors on a T5120 :-( The parity algorithms are really
> slow on that CPU. And looking at the VIS(1+2) instruction set, I doubt
> they can be significantly accelerated (VIS is old and lacks the
> required 8 bits operations, it doesn't even get any kind of shifts
> before VIS3). Unless we can somehow leverage the cryptographic stuff
> (the Modular Arithmetic Unit, MUA) ? But I don't see any documentation
> beyond "go through the Solaris driver" :-(
Interesting to note, thank you. I had been expecting a 3-disk RAIDZ plus
a spare. But, I'm sure I can readjust to a pair of mirrors instead. Just
have to think more about which filesystems go on which volume than I had.
> Anyway for the new Debian I'm combining this page
> <https://github.com/zfsonlinux/zfs/wiki/Debian-Stretch-Root-on-ZFS>
> and this ML with this:
> sudo debootstrap --no-check-gpg sid /mnt
> http://ftp.ports.debian.org/debian-ports
> /mnt is where the ZFS root is mounted (didn't do anywhere near as many
> FS as the wiki suggests).
>
> ZFS is on /dev/sdd2, with /dev/sdd1 a "boot partition" similar to the
> one debian-installer added on /dev/sdc, as it is apparently required.
Thanks. I tried to set up my sda that same way, with ZFS on sda2, and a boot
partition on sda1. The one installed on my /dev/sdd by the installer looks
the same, just with two ext partitions and swap on sdd2, sdd4, and sdd5. But,
as noted recently, that doesn't work. Are you installing with the grub-install
that's in grub-common + grub-ieee1275 version 2.02+dfsg1-4 ? I wonder why
my grub-install onto my sda1 isn't working, and yours onto your sdd1 is.
Can you show me the parted for your sdd? My sda is:
Model: SEAGATE ST914603SSUN146G (scsi)
Disk /dev/sda: 147GB
Sector size (logical/physical): 512B/512B
Partition Table: sun
Disk Flags:
Number Start End Size File system Flags
1 0.00B 502MB 502MB ext2 boot
2 502MB 147GB 146GB zfs
Thanks.
- Chris
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