From Linux Man Pages
convertquota - convert quota from old file format to new one
convertquota [ -ug ] [ -e | -f ] filesystem
DESCRIPTION
convertquota converts old quota files quota.user and quota.group to files aquota.user and aquota.group in new
format currently used by 2.4.0-ac? and newer or by SuSE or Red Hat Linux 2.4 kernels on filesystem.
New file format allows using quotas for 32-bit uids / gids, setting quotas for root, accounting used space in
bytes (and so allowing use of quotas in ReiserFS) and it is also architecture independent. This format introduces
Radix Tree (a simple form of tree structure) to quota file.
OPTIONS
-u, --user
convert user quota file. This is the default.
-g, --group
convert group quota file.
-f, --convert-format
convert from old file format to new one. This is the default.
-e, --convert-endian
convert new file format from big endian to little endian.
-V, --version
print version information.
FILES
aquota.user new user quota file
aquota.group new group quota file
RELATED
quota(1), setquota(8), edquota(8), quotacheck(8), quotaon(8), repquota(8)
CATEGORY