[linux-lvm] (LONG) Delay when writing to LVM after boot

[L A Walsh]

Brassow Jonathan wrote:
> Performing a block-level write directly to the logical volume could help determine the answer to whether the problem is with the logical volume or the file system.  You have to be willing to destroy your file system ....
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Since it is lvm, maybe it would be possible to allocate space for a
100GB partition or something? and use that for test w/no file system on it?

Then put a FS on it and see if it does the same thing.

Insn't ext4 extent-based like xfs?

If you do a large write on xfs -- it will try to find a space large enough
for the whole thing.

If your disk's freespace is fragmented maybe ext4 is looking for
the space for the file and has to read in all the free areas the
first time?

Sounds more likely to be a FS prob than lvm.