b-
On Tue, 01 Feb 2005 20:01:12 +0100, Robert Heinzmann <Robert.Heinzmann@xxxxxxx> wrote:
Hello,
can someone verify if the following statements are true ?
- It's not possible to simply convert a existing partition with a filesystem on it to a raid1 mirror set.
This may seem succesfull (filesystem can be mounted and must not be checked), but it will cause data integrity problems. One of the last Blocks of the device formaly used for file data will be used for the raid superblock and so all data on this block will be not accessible anymore.
- Using a former disk of a raid1 array as a usual disk (not mounted as degrated /dev/mdX, but instead mounted as /dev/sdX or /dev/hdX) is successfull.
This is because the MD device layer reports the device size as size of disk - superblock offset during the creation of a filesystem on the MD device. Thus the used size of the disk, when mounting it as /dev/sdX /dev/hdX, is some KB smaller than it could be, but no data is lost.
- Its always possible to use raid1 disks as regular disks (not taking the md autodiscovery into concern). Using regular disks as raid disks always requires data migration (new filesystem and copy).
Thank you very much. I would really appreshiate some somments on this one.
Robert Heinzmann - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
