Hitachi AMS 2100 Hardware Manual page 192

While executing the setting/reference operation by Hitachi Storage
Navigator Modular 2, the performance of the array for the host I/O may
deteriorate.
If executing multiple settings/references by Hitachi Storage Navigator
Modular 2 at the same time, the performance of the array for the host I/O
may further deteriorate compared to single execution. We recommend you
perform less than 5 operations to the array during host I/O execution.
The setting/reference operations that one array can receive from Hitachi
Storage Navigator Modular 2 can have the upper limits shown in the
following table.
If you try to execute the maximum number of operations that can be
received at one time for an array, the following errors may occur.
7–10
Table 7-6: Maximum Number of Operations
Array Firmware
08C5/A or later
Earlier than 08C5/A
Message
DMEA000006 0x00060000
DMEA000007 0x00070000
DMEA00000B 0x00001002
Configuration
Hitachi AMS 2100/2300 Storage System Hardware Guide
Maximum Number of Operations That Can
Be Received at One time
50 operations
5 operations
Table 7-7: Error Messages
Error Code Message Text
Failed to connect with the
subsystem. Confirm the
subsystem status and the LAN
environment, and then try again.
An invalid response was received
from the subsystem. Confirm the
subsystem status and the LAN
environment, and then try again.
Failed to transfer data. Confirm
the subsystem status and the LAN
environment, and then try again.