Service Manual
JetStor SAS 742F
11
Problem
What to do / What to Replace
One or more disk drives
is/are not detected on one
or more slots.
1. Make sure the disk drive (SATA or SAS) is
good. Verify that the Power On/Fail LED is
green (good). If LED is red, try the disk drive
in another disk slot.
2. If disk drive is SATA and RAID subsystem is
in dual controller mode, check or replace the
dongle board connected to the SATA disk
drive. Make sure the dongle board is working
fine. Swap with another dongle board, if
possible, and try again the disk drive in
another slot.
3. Make sure the firmware version of Expander
modules and RAID controller expander are all
the same. If not, upgrade each expander to
the same (common) version.
4. Try to replace the suspected Expander
module (see Section 10) or RAID controller
(see Section 4).
5. If the disk drive is good, the dongle board is
good, and Expander firmware are all same,
and Expander module and RAID controller
have been checked/replaced, but a disk drive
is always not detected on the same slot but
works in another slot, replace the bottom
board. Refer to Section 9. And take note
which disk slot have problem and replace the
corresponding bottom board. See the second
picture in Section 9 step G.
