Section 060-INDP-111 System Description 2-77
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
message journal files and secondary (polled) call record data files. The
number is entered into the file upon creation of the file on the disk. After the
file has been polled, the number is decremented by one at 1 a.m. of each day.
The file is deleted when:
• the (down) count reaches zero.
• when it is the oldest file on disk with AMA storage exceeding 70%, or
with AMA file versions exceeding 200.
The recovery strategy is implemented in three stages, each of which is
directly related to disk capacity. The first stage occurs when the amount of
disk space allocated for AMA data is exceeded (70 percent of the total disk
capacity).
Note: Total disk capacity for a BMC is 95 percent of total disk space
available. When total disk capacity (100 percent disk usage) is referred to
throughout this section in relation to AMA files, it refers to 95 percent of
actual BMC disk capacity. The remaining 5 percent is reserved for
emergency conditions when the redundancy of the disks has been
disengaged. Data is written in this reserved 5 percent when polling of
non-redundant disks is underway.
The following ERRMAP and log messages are active at the specified disk
percent used levels. Refer to the Maintenance Procedures Guide section for
the procedures to alleviate the conditions indicated in Table 2-18.
When a DISK FULL condition exists, the BMC does not write-over stored
primary data. Instead, it switches to an ONLY (SPLIT) Disk mode and
continues writing data to the other disk. When this disk becomes full, an EOT
Table 2-18
Disk capacity indications requiring maintenance activity
Disk Usage ERRMAP Entry Corresponding Log Message
70% DSK 70% PRIMARY NO SECONDARY FILE TO DELETE
90% DSK 90% PRIMARY LOG FILES DELETED
99% OFFLN DSK FULL OFFLINE DISK FULL
Both Disks Full DSK STORE LIMIT BOTH DISKS FULL
Note:
To determine what percentage of the disk has been used, refer to the DISK USAGE
command in the
Command and Message Guide
section.
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