Re: AS400 9402 Model 400 2130

Well if this helps any you can have 23.6 G max at v3r6 and 50.3 at v3r7 and up.


>>> dhandy@isgroup.net 02/03/00 11:22PM >>>

>Please also let me know the maximum number of disk units that this system can 
>have? 

The base unit has slots for a maximum of 4 drives, but will only power
all 4 drives if you have the 5135 feature power supply.   To have more
than 4 drives requires the 7117 expansion feature.  This changes the
width of the machine from about 8" to about 14 1/2" (200mm to 370mm).
The 7117 expansion adds 8 additional disk slots, 2 additional tape
slots, and 4 additional card slots.  The 7117 can also have different
sized power supplies, and you need the bigger one to handle all 8 disk
drives.

Adding disks in the 7117 also means you need a disk controller (eg
6502 or 6522) in the 7117 as the base MFIOP only handles the 4 disk
slots in the base unit.

The 400-2130 can also use 6607 drives instead, which hold just over
4GB each.  Changing the load source (disk 1) is more work, but you
could put 6607's in slots 2-4 and get 14GB total (one 6606 and three
6607) without the need for a 7117 expansion.

However, there are advantages to using the 7117 instead.  The 6502 and
6522 disk controllers allow RAID-5.  Buy eight 6606 drives instead of
seven, then configure it for RAID-5 protection.  In the base unit,
convert drive 2 to be a mirror of drive 1.  Now your whole system is
protected against data loss from a DASD failure.  As you may know, the
6606 drives are famous for their "stiction" problems.

Another advantage is that you'll have more disk arms which typically
means better response time.  Plus have room for feature adapter cards
and/or tape drives.

If you need a good source for the 7117 expansion unit, let me know
off-line and we can continue via email.

Doug
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