raid5 resizing
Hi, I'm thinking of slowly replacing disks in my raid5 array with bigger disks and then resize the array to fill up the new disks. Is this possible? Basically I would like to go from: 3 x 500gig RAID5 to 3 x 1tb RAID5, thereby going from 1tb to 2tb of storage. It seems like it should be, but... :) -- To the extent that we overreact, we proffer the terrorists the greatest tribute. - High Court Judge Michael Kirby - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: raid5 resizing
On Wednesday December 19, [EMAIL PROTECTED] wrote: Hi, I'm thinking of slowly replacing disks in my raid5 array with bigger disks and then resize the array to fill up the new disks. Is this possible? Basically I would like to go from: 3 x 500gig RAID5 to 3 x 1tb RAID5, thereby going from 1tb to 2tb of storage. It seems like it should be, but... :) Yes. mdadm --grow /dev/mdX --size=max NeilBrown - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: raid5 resizing
On Wed, Dec 19, 2007 at 10:59:41PM +1100, Neil Brown wrote: On Wednesday December 19, [EMAIL PROTECTED] wrote: Hi, I'm thinking of slowly replacing disks in my raid5 array with bigger disks and then resize the array to fill up the new disks. Is this possible? Basically I would like to go from: 3 x 500gig RAID5 to 3 x 1tb RAID5, thereby going from 1tb to 2tb of storage. It seems like it should be, but... :) Yes. mdadm --grow /dev/mdX --size=max Oh -joy-. I love linux sw raid. :) The only thing it seems to lack is battery backed-up cache. Thank you. -- To the extent that we overreact, we proffer the terrorists the greatest tribute. - High Court Judge Michael Kirby - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: raid5 resizing
Neil Brown wrote: On Monday May 1, [EMAIL PROTECTED] wrote: Hey folks. There's no point in using LVM on a raid5 setup if all you intend to do in the future is resize the filesystem on it, is there? The new raid5 resizing code takes care of providing the extra space and then as long as the say ext3 filesystem is created with resize_inode all should be sweet. Right? Or have I missed something crucial here? :) You are correct. md/raid5 makes the extra space available all by itself. Further - even if you don't create the filesystem with the right amount of extra metadata space for online resizing, you can resize any ext2/3 filesystem offline, and it doesn't take very long. You just use resize2fsf instead of ext2online -Mike - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: raid5 resizing
On Monday May 1, [EMAIL PROTECTED] wrote: Hey folks. There's no point in using LVM on a raid5 setup if all you intend to do in the future is resize the filesystem on it, is there? The new raid5 resizing code takes care of providing the extra space and then as long as the say ext3 filesystem is created with resize_inode all should be sweet. Right? Or have I missed something crucial here? :) You are correct. md/raid5 makes the extra space available all by itself. NeilBrown - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
