A storage management device (5, 12) is intended for managing data storage
areas (DSB) of a mass storage, such as a hard disk (5), for example,. Associated
data storage areas (ID1, ID2, ID3) of the mass storage are
concatenated by concatenation data (VD). The storage management device (5, 12)
contains backup means (12) in order to determine backup data (SD), before
overwriting the concatenation data (VD) with modified concatenation data (GVD),
the backup data (SD) identifying the modified concatenation data (GVD) to be stored
on the mass storage. If the process of storing the modified concatenation (GVD)
is unexpectedly interrupted, the storage management device (5, 12) is designed
to determine valid concatenation data (VD, GVD).
