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SubjectHelp needed: Partitioned software raid > 2TB
Hi everyone,

I added a drive to a linux software RAID-5 last night. Now that worked
fine... until I changed the partition table.

Disk /dev/md_d5: 2499.9 GB, 2499990978560 bytes
2 heads, 4 sectors/track, 610349360 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Device Boot Start End Blocks Id System
/dev/md_d5p1 1 244142 976566 83 Linux
/dev/md_d5p2 244143 5126956 19531256 8e Linux LVM
/dev/md_d5p3 5126957 488279488 1932610128 8e Linux LVM

This is how the layout looked before the changes.

Device Boot Start End Blocks Id System
/dev/md_d5p1 1 244142 976566 83 Linux
/dev/md_d5p2 244143 5126956 19531256 8e Linux LVM
/dev/md_d5p3 5126957 73478448 273405968 8e Linux LVM

This is how it looks now - the fdisk tools (fdisk/cfdisk) are unable to
crate a single partition > 2TB. Of course now LVM complains that the PV
is too small:
WARNING: Physical Volume /dev/md_d5p3 is too large for underlying device
PV Size 260.74 GB / not usable 8192.00 EB

I was able to restore a somewhat close partition table now... Close
enough for the LVM to work correctly.

Device Boot Start End Blocks Id System
/dev/md_d5p1 1 244142 976566 83 Linux
/dev/md_d5p2 244143 5126956 19531256 8e Linux LVM
/dev/md_d5p3 5126957 488279495 1932610156 8e Linux LVM
/dev/md_d5p4 488279496 73478448 488279460 8e Linux LVM

Where is the inherent limit? The partitioning software, or partitioning
all by itself?

Regards,
Christian
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