Hi, i'm having problems with growing my RAID0 array over 2 TB. I installed two 4 TB drives, created 4 TB partitions but array cannot be resized over 2 TB. Superblock versoin is 0.90 and kernel version is 3.2.53 - according to linux RAID wiki, it should support 4 TB component/array size: https://raid.wiki.kernel.org/index.php/RAID_superblock_formats#The_version-0.90_Superblock_Format Some more info: # mdadm --detail /dev/md2 /dev/md2: Version : 0.90 Creation Time : Tue Sep 28 16:54:04 2010 Raid Level : raid1 Array Size : 2147483520 (2048.00 GiB 2199.02 GB) Used Dev Size : 2147483520 (2048.00 GiB 2199.02 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Sat Sep 6 23:04:44 2014 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 9a363004:ad04abfe:2e31e1c3:caf66df4 Events : 0.77066 Number Major Minor RaidDevice State 0 8 33 0 active sync /dev/sdc1 1 8 49 1 active sync /dev/sdd1 # fdisk /dev/sdd WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted. WARNING: The size of this disk is 4.0 TB (4000787030016 bytes). DOS partition table format can not be used on drives for volumes larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID partition table format (GPT). Command (m for help): p Disk /dev/sdd: 4000.8 GB, 4000787030016 bytes 256 heads, 63 sectors/track, 484501 cylinders, total 7814037168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdd1 1 4294967295 2147483647+ ee GPT # fdisk /dev/sdc WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted. WARNING: The size of this disk is 4.0 TB (4000787030016 bytes). DOS partition table format can not be used on drives for volumes larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID partition table format (GPT). Command (m for help): p Disk /dev/sdc: 4000.8 GB, 4000787030016 bytes 256 heads, 63 sectors/track, 484501 cylinders, total 7814037168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 1 4294967295 2147483647+ ee GPT # mdadm --grow /dev/md2 --size=max mdadm: component size of /dev/md2 unchanged at 2147483520K # mdadm --grow /dev/md2 --size=3221225280 mdadm: Cannot set device size for /dev/md2: No space left on device Any hints? Thank you. azur -- 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
