Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 10/21/2011 09:30 PM, Gerald Brandt wrote: > Hi, > > I've successfully resize the lower level RAID-6 array, and grown it. I'm now attempting to resize drbd, and nothing seems to happen. > > /dev/md0 is definitely bigger. > > What should I see during a drbd resize? You should see a DRBD resync of the newly added space. What is the lower level device of your DRBD resource? The whole md0, a partition on md0, a lv on a vg on a pv on md0? ... so if the lower level device has been resized on both nodes, DRBD should definitely grow on a "drbdadm resize". Did I mention that on starting DRBD it is resized automatically if a bigger lower level device is detected? ... have a look at the kernel logs... Regards, Andreas -- Need help with DRBD? http://www.hastexo.com/now > > Gerald > > > ----- Original Message ----- >> From: "Gerald Brandt" <gbr at majentis.com> >> To: drbd-user at lists.linbit.com >> Sent: Tuesday, October 18, 2011 7:08:55 AM >> Subject: Re: [DRBD-user] Increasing a DRBD array >> >> Hi, >> >> Okay, this is my list of what to do, and in what order: >> >> 1. remove the primary from DRBD >> 2. add the physical disk to the primary >> 3. add the primary back to DRBD and allow resync. >> 4. remove the secondary from DRBD >> 5. add the physical disk to the secondary >> 6. add the secondary back to DRBD and allow resync. >> 7. fdisk and add the disk to the RAID array on primary and secondary >> 8. grow the RAID array on the primary and secondary (while mounted or >> not mounted?) >> 9. drbdadm resize on the primary (can this be done while drbd is in >> use?) >> 10. expand the file system on the primary only (via Citrix XenServer >> (iSCSI)) >> >> That sounds about right. As long as I don't lose data. (yeah, >> backups. That's left up to my client, but becomes my problem if >> they failed.) >> >> Gerald >> >> >> >> ----- Original Message ----- >>> From: "Florian Haas" <florian at hastexo.com> >>> To: drbd-user at lists.linbit.com >>> Sent: Tuesday, October 18, 2011 3:53:11 AM >>> Subject: Re: [DRBD-user] Increasing a DRBD array >>> >>> On 2011-10-17 22:19, Matt Graham wrote: >>>>>> Your DRBD uses the MD RAID as its backing device, doesn't it? >>>>>> That means you'll have add the drive and resize your RAID >>>>>> first, >>>>>> then >>>>>> you can resize your DRBD, and then expand the file system. >>>>> Definitely built on top of the RAID. I'm a bit confused by your >>>>> answer though. Step 8 grows the RAID array, and I don't have a >>>>> step >>>>> to grow DRBD. Does that mean I'm missing something? >>>> >>>> 8. mdadm --grow /dev/md0 (other mdadm options) >>>> Do that on both machines. >>>> 8.1 (on secondary) drbdsetup /dev/drbd0 resize >>>> 8.2 (on primary) drbdsetup /dev/drbd0 resize >>> >>> There's a "resize" subcommand for drbdadm too; no need to use >>> drbdsetup. >>> And it needs to be done on one node only. Just do "drbdadm resize >>> <resourcename>" on the primary while the two nodes are connected, >>> and >>> you're good to go. >>> >>>> The softRAID is below the DRBD device. Once the softRAID is >>>> larger, the DRBD device needs to be informed of this fact. >>>> When making arrays/devices larger, you go bottom-up; you make >>>> the hardware changes first, then softRAID changes, then DRBD >>>> changes, then filesystem changes. >>>> 9. (on primary) resize2fs /dev/drbd0 >>> >>> If it's ext3 and if it supports on-line resizing, of course. But >>> that >>> should be obvious. >>> >>> Cheers, >>> Florian >>> >>> -- >>> Need help with DRBD? >>> http://www.hastexo.com/knowledge/drbd >>> _______________________________________________ >>> drbd-user mailing list >>> drbd-user at lists.linbit.com >>> http://lists.linbit.com/mailman/listinfo/drbd-user >>> >> _______________________________________________ >> drbd-user mailing list >> drbd-user at lists.linbit.com >> http://lists.linbit.com/mailman/listinfo/drbd-user >> > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 286 bytes Desc: OpenPGP digital signature URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20111021/e7f21b38/attachment.pgp>