[SOLVED] Proxmox 4.0: Failed to boot after zfs install : cannot import rpool: no such pool

I completely zeroed the disks and reinstalled. Now it works.

Maybe interesting is, that the disk didn't have a partition table on the previous installation with software RAID. It was a software RAID 1 with complete disks (sda and sdb).

But using ZFS shouldn't depending on the previous layout of the disks?
 
3Gb/s is 300MB/s, and since I'm using RAID10 on 4 disks, it could read the data from 2 disks in parallel at the same time. The technical specification of Velociraptor 1TB states that "Data transfer rate (max) Host to/from drive (sustained) - 200 MB/s" so can be 400MB/s. In addition, and it what worries me more, the Intel DC3710 SSD that is acting as cache should exceed the 450MB/s, and having a bottleneck there seems not smart.
Of course it "will work", but I'm wondering why on a "server class" MB they have saved some dollar to use a 3GB/s chip instead of a more performant one.
 
Hi,

I had a similar problem resulting in exactly the same error message as described by the others. I installed PVE 4 on a laptop with one hard disk and one ssd: zraid0 on the only harddisk, which worked perfectly, even reboots and then added the ssd as a caching device (L2ARC and ZIL), which worked until reboot: yields the aforementioned error message. I reinstalled it thrice, no luck (tried also legacy and uefi). I ended up using a very small boot and root LVM (4GB) and ZFS on a big partition with SSD caching. I moved /usr, /var/log and /var/lib/vz on individual ZFS volumes.

Best,
Andreas
 
mmenaz said:
3Gb/s is 300MB/s, and since I'm using RAID10 on 4 disks, it could read the data from 2 disks in parallel at the same time. The technical specification of Velociraptor 1TB states that "Data transfer rate (max) Host to/from drive (sustained) - 200 MB/s" so can be 400MB/s. In addition, and it what worries me more, the Intel DC3710 SSD that is acting as cache should exceed the 450MB/s, and having a bottleneck there seems not smart.
Of course it "will work", but I'm wondering why on a "server class" MB they have saved some dollar to use a 3GB/s chip instead of a more performant one.
Click to expand...

Still, there are 3Gbit per channel, not per controller, right? Regarding DC3710, you will see limits on sequential reads (but they will be off-loaded to main storage if the L2ARC is too busy, I think). Having 300MB/sec of random read I/O is nice enough. You can add 2 of them, smaller size, to keep the costs down.
 
Last edited:
sigxcpu said:
Still, there are 3Gbit per channel, not per controller, right?
Click to expand...
Oh, you are right, seems not a big issue then! I'll do some test, if this issue can be solved for me completely erasing the 4 HD. Wondering why now there are 12MB/s sas/sata controllers available. Thanks for the clarification
 
You marked as solved, but today I've tested my hd and have no mdadm raid info, nor it works with a new driver.
a) ZFS Raid0 fails the same
b) ext4 on the same driver works fine
c) erasing (just in case) dd if=/dev/zero of=$YOUR_DEV bs=512 seek=$(( $(blockdev --getsz $YOUR_DEV) - 1024 )) count=1024 did not changed anything
I've the following output of some commands suggested in the thread:
Code: 
zpool import
   pool: rpool
     id: 4282105346604124069
  state: ONLINE
 action: The pool can be imported using its name or numeric identifier.
 config:

    rpool       ONLINE
      sda2      ONLINE

#ls /dev/disk/by-id/
ata-HL-DT-ST_DVDRAM_GH24NSC0_K51F2SE4829
ata-WDC_WD1000CHTZ-04JCPV1_WD-WX41E748RVDP
ata-WDC_WD1000CHTZ-04JCPV1_WD-WX41E748RVDP-part1
ata-WDC_WD1000CHTZ-04JCPV1_WD-WX41E748RVDP-part2
ata-WDC_WD1000CHTZ-04JCPV1_WD-WX41E748RVDP-part9
usb-JetFlash_Transcend_16GB_08RGI62F8R9DYG8A-0:0
usb-JetFlash_Transcend_16GB_08RGI62F8R9DYG8A-0:0-part1
wwn-0x5001480000000000
wwn-0x50014ee65a7463e0
wwn-0x50014ee65a7463e0-part1
wwn-0x50014ee65a7463e0-part2
wwn-0x50014ee65a7463e0-part9

# blkid -l -t TYPE="zfs_member"
/dev/sda2: LABEL="rpool" UUID="4282105346604124069" UUID_SUB="6939510755325752309" TYPE="zfs_member" PARTLABEL="zfs" PARTUUID="a5a61a3d-c4dc-4eaa-9b55-cd9cb7cdb359"

# blkid | grep "zfs_member"
/dev/sda2: LABEL="rpool" UUID="4282105346604124069" UUID_SUB="6939510755325752309" TYPE="zfs_member" PARTLABEL="zfs" PARTUUID="a5a61a3d-c4dc-4eaa-9b55-cd9cb7cdb359"

Installation of Proxmox has been done with usb
I'm clueless, frustrated and any help is very appreciated!
(last step is a long dd zero of the hd, just in case... but I'm waiting it to finish)
 
Thanks a lot for the reply, but I thin I don't understand what you mean.
When the boot stops I've the same message as the original poster (except a preceding line, just noticed, with "no controller found" then "loading, please wait" the the output mentioned (I attach a screenshot, don't know how to copy from console to text mode file).
Then if I issue "zpool import" I've the output I've mentioned in my previous post
Code: 
# zpool import
   pool: rpool
     id: 4282105346604124069
  state: ONLINE
 action: The pool can be imported using its name or numeric identifier.
 config:

    rpool       ONLINE
      sda2      ONLINE
I've dd zeroed the entire hd but I get the same problem (no no raid-metadata related).
Boot_fail_IMG_20151013_113146_small_low.jpg
 
I've tried after failed boot:
Code: 
# zpool import -d /dev/disk/by-id rpool -R /root
# exit
failed to mount root filesystem 'rpool/ROOT/pve-1'
# exit
and it boots! But if I reboot t fails in the same way (busybox)
Any clue of the reason of this problem and how to permanently solve?
Thanks a lot
 
Try this:

Boot the system as you did and then:

Code: 
[FONT=courier new]
[/FONT][COLOR=#333333][FONT=Consolas][FONT=courier new]# zpool set cachefile= rpool
# update-initramfs -k `uname -r` -u
# reboot[/FONT]
[/FONT][/COLOR]



 
Yes, a new server Intel S2400SC, iso is the latest 4.0 iso (stable) in a usb stick. If I install with ext4 everything works fine. ZFS raid1 on one disk or 10 on 4 disks has the same problem (haven't tested different ZFS raid, just telling what I tested). Could it be that at boot time is not able to grab some drivers / wrong timing in mounting something? I've a vague memory of some thread with troubles on zfs and something added in a config file to have things go at different moment, but can't find anymore.
 
From your error message I could say that the disk drivers are not available at the zpool import time. What disk controller do you have?

Btw, I've seen in a post above that you have a single WD drive on SATA? How did you do RAID1 or RAID10 then?
 
About my HD configuration, I wrote it wrong, I'm doing RAID0 with one disk, sorry!
If you don't mind, I would open a new thread with similar subject because
a) this has been marked as "solved", so I get less attention
b) my problem is not related to the one had the creator of the thread
Thanks a lot
 
Last edited:
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