FUJITSU DISK DRIVES MHM215OAT - Manual (Page 43)

Installation Conditions
3-6 C141-E104-02EN
IMPORTANT
Because of breather hole mounted to the HDD, do not allow this to
close during mounting.
Locating of breather hole is shown as Figure 3.4 in both MHL
series and MHM series.
For breather hole of Figure 3.4, at least, do not allow its around
φ
3
to block.
Figure 3.4 Location of breather