could not link file "pg_xlog/xlogtemp.72606"

Hi there,

We recently copied over our 8.3 database cluster files from a local disk to a network attached storage drive.

Everything seemed to work okay for a while until we got this error:

ERROR: could not link file "pg_xlog/00000001000000AA00000030" to "pg_xlog/00000001000000AA00000096" (initialization of log file 170, segment 150): Operation not supported

pg_xlog/00000001000000AA00000096 does not exist in the original file tree, so I'm wondering if there's some special link that PG is trying to create that is not permitted in the NAS drive?

This is for Postgresql 8.3 + PostGIS 1.5

Would appreciate any pointers. This is a test environment, so nothing is lost, but we'd like to use the NAS for storage as the local disk doesn't have enough space.

Claire.