Find RAID level, Change RAID level.
Hello, I was wondering is it possible to find the RAID level currently in use by a btrfs volume, also can I change the data metadata (or either) RAID levels after creation. Thanks. -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Find RAID level, Change RAID level.
On Sun, Oct 30, 2011 at 12:28:39AM +1030, Jordan Windsor wrote: Hello, I was wondering is it possible to find the RAID level currently in use by a btrfs volume, also can I change the data metadata (or either) RAID levels after creation. To see the RAID levels, use btrfs fi df /path/to/filesystem To change RAID levels, you will need Ilya Dryomov's restriper patches, which were posted to this list back in August. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Ceci est un travail pour l'Australien. --- signature.asc Description: Digital signature
Re: Find RAID level, Change RAID level.
On Sun, Oct 30, 2011 at 01:06:49AM +1030, Jordan Windsor wrote: On Sun, Oct 30, 2011 at 1:04 AM, Hugo Mills h...@carfax.org.uk wrote: On Sun, Oct 30, 2011 at 12:55:33AM +1030, Jordan Windsor wrote: On Sun, Oct 30, 2011 at 12:43 AM, Hugo Mills h...@carfax.org.uk wrote: On Sun, Oct 30, 2011 at 12:28:39AM +1030, Jordan Windsor wrote: Hello, I was wondering is it possible to find the RAID level currently in use by a btrfs volume, also can I change the data metadata (or either) RAID levels after creation. To see the RAID levels, use btrfs fi df /path/to/filesystem To change RAID levels, you will need Ilya Dryomov's restriper patches, which were posted to this list back in August. Thanks, so If it mentions DUP on the metadata system line I'm using RAID1? No, DUP is two copies of the data (or metadata), but kept on the same block device. If the word RAID isn't mentioned, I'm in single mode for both metadata data? If there's nothing at all, then it's single. If it says DUP, then you have two redundant copies, but they could both be on the same block device, so it'll protect you from a bad block or out-of-band data corruption, but not from the loss of the whole disk. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Ceci est un travail pour l'Australien. --- signature.asc Description: Digital signature
Re: Find RAID level, Change RAID level.
On Sun, Oct 30, 2011 at 1:14 AM, Hugo Mills h...@carfax.org.uk wrote: On Sun, Oct 30, 2011 at 01:06:49AM +1030, Jordan Windsor wrote: On Sun, Oct 30, 2011 at 1:04 AM, Hugo Mills h...@carfax.org.uk wrote: On Sun, Oct 30, 2011 at 12:55:33AM +1030, Jordan Windsor wrote: On Sun, Oct 30, 2011 at 12:43 AM, Hugo Mills h...@carfax.org.uk wrote: On Sun, Oct 30, 2011 at 12:28:39AM +1030, Jordan Windsor wrote: Hello, I was wondering is it possible to find the RAID level currently in use by a btrfs volume, also can I change the data metadata (or either) RAID levels after creation. To see the RAID levels, use btrfs fi df /path/to/filesystem To change RAID levels, you will need Ilya Dryomov's restriper patches, which were posted to this list back in August. Thanks, so If it mentions DUP on the metadata system line I'm using RAID1? No, DUP is two copies of the data (or metadata), but kept on the same block device. If the word RAID isn't mentioned, I'm in single mode for both metadata data? If there's nothing at all, then it's single. If it says DUP, then you have two redundant copies, but they could both be on the same block device, so it'll protect you from a bad block or out-of-band data corruption, but not from the loss of the whole disk. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Ceci est un travail pour l'Australien. --- Just curious, If I go with RAID1 will I still get the speed boost that comes along with RAID0? (Read from both drives) Thanks. -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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Re: Find RAID level, Change RAID level.
Hallo, Jordan, Du meintest am 30.10.11: I was wondering is it possible to find the RAID level currently in use by a btrfs volume, also can I change the data metadata (or either) RAID levels after creation. To see the RAID levels, use btrfs fi df /path/to/filesystem I've just run that command on my system: Data, RAID0: total=3.81TB, used=3.71TB System, RAID1: total=16.00MB, used=244.00KB System: total=4.00MB, used=0.00 Metadata, RAID1: total=16.25GB, used=4.78GB And that shows what I have defined via mkfs.btrfs: ... --data raid0 --metadata raid1 What tells your system? What do you want to be installed? Viele Gruesse! Helmut -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
