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 12:43 AM, Hugo Mills 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. > > 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. --- > Thanks, so If it mentions "DUP" on the metadata & system line I'm using RAID1? -- 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 12:55:33AM +1030, Jordan Windsor wrote: > On Sun, Oct 30, 2011 at 12:43 AM, Hugo Mills 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. 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 1:04 AM, Hugo Mills 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 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. > > 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. --- > If the word RAID isn't mentioned, I'm in single mode for both metadata & data? 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 01:06:49AM +1030, Jordan Windsor wrote: > On Sun, Oct 30, 2011 at 1:04 AM, Hugo Mills 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 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 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 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 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
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
Re: Find RAID level, Change RAID level.
On Sun, Oct 30, 2011 at 6:40 AM, Helmut Hullen wrote: > 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 > Thanks, It currently shows this: Data: total=195.01GB, used=193.93GB System, DUP: total=8.00MB, used=28.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=1.75GB, used=385.41MB Metadata: total=8.00MB, used=0.00 I didn't specify any RAID levels during creation. I'd like to have a RAID0 installation across two hard drives. -- 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 Mon, Oct 31, 2011 at 12:10:34AM +1030, Jordan Windsor wrote: > Thanks, It currently shows this: > > Data: total=195.01GB, used=193.93GB > System, DUP: total=8.00MB, used=28.00KB > System: total=4.00MB, used=0.00 > Metadata, DUP: total=1.75GB, used=385.41MB > Metadata: total=8.00MB, used=0.00 > > I didn't specify any RAID levels during creation. I'd like to have a > RAID0 installation across two hard drives. How many devices do you have in your FS right now ? If it's only 1 then add another one (btrfs device add ) and run balance (btrfs fi balance ). That should give you raid0 for data across two drives w/o applying any patches. Thanks, Ilya > -- > 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 -- 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 Mon, Oct 31, 2011 at 12:36 AM, Ilya Dryomov wrote: > On Mon, Oct 31, 2011 at 12:10:34AM +1030, Jordan Windsor wrote: >> Thanks, It currently shows this: >> >> Data: total=195.01GB, used=193.93GB >> System, DUP: total=8.00MB, used=28.00KB >> System: total=4.00MB, used=0.00 >> Metadata, DUP: total=1.75GB, used=385.41MB >> Metadata: total=8.00MB, used=0.00 >> >> I didn't specify any RAID levels during creation. I'd like to have a >> RAID0 installation across two hard drives. > > How many devices do you have in your FS right now ? If it's only 1 then > add another one (btrfs device add ) and run balance > (btrfs fi balance ). That should give you raid0 for data > across two drives w/o applying any patches. > > Thanks, > > Ilya >> -- >> 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 > Thanks, I was wondering if I added a device that was already part of another btrfs volume, then would I have the files merged as one volume or overwritten in the newly added one? -- 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 Mon, Oct 31, 2011 at 12:56:51AM +1030, Jordan Windsor wrote: > On Mon, Oct 31, 2011 at 12:36 AM, Ilya Dryomov wrote: > > On Mon, Oct 31, 2011 at 12:10:34AM +1030, Jordan Windsor wrote: > >> Thanks, It currently shows this: > >> > >> Data: total=195.01GB, used=193.93GB > >> System, DUP: total=8.00MB, used=28.00KB > >> System: total=4.00MB, used=0.00 > >> Metadata, DUP: total=1.75GB, used=385.41MB > >> Metadata: total=8.00MB, used=0.00 > >> > >> I didn't specify any RAID levels during creation. I'd like to have a > >> RAID0 installation across two hard drives. > > > > How many devices do you have in your FS right now ? If it's only 1 then > > add another one (btrfs device add ) and run balance > > (btrfs fi balance ). That should give you raid0 for data > > across two drives w/o applying any patches. > > Thanks, I was wondering if I added a device that was already part of > another btrfs volume, then would I have the files merged as one volume > or overwritten in the newly added one? You'll lose the original data on the disk you're adding. No merging will take place. 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 --- argc, argv, argh! --- signature.asc Description: Digital signature
Re: Find RAID level, Change RAID level.
On Mon, Oct 31, 2011 at 12:56:51AM +1030, Jordan Windsor wrote: > On Mon, Oct 31, 2011 at 12:36 AM, Ilya Dryomov wrote: > > On Mon, Oct 31, 2011 at 12:10:34AM +1030, Jordan Windsor wrote: > >> Thanks, It currently shows this: > >> > >> Data: total=195.01GB, used=193.93GB > >> System, DUP: total=8.00MB, used=28.00KB > >> System: total=4.00MB, used=0.00 > >> Metadata, DUP: total=1.75GB, used=385.41MB > >> Metadata: total=8.00MB, used=0.00 > >> > >> I didn't specify any RAID levels during creation. I'd like to have a > >> RAID0 installation across two hard drives. > > > > How many devices do you have in your FS right now ? If it's only 1 then > > add another one (btrfs device add ) and run balance > > (btrfs fi balance ). That should give you raid0 for data > > across two drives w/o applying any patches. > > > > Thanks, > > > > Ilya > >> -- > >> 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 > > > > Thanks, I was wondering if I added a device that was already part of > another btrfs volume, then would I have the files merged as one volume > or overwritten in the newly added one? A device can only be part of another btrfs FS, not sure what you mean by volume. If you add a device which is part of another btrfs FS you'll break that FS and the data on that device will be overwritten. Thanks, Ilya -- 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
