Tandem Capacity Model (TCM) Manual
This entry can contain only one disk model number.
[w]
specifies the write cache enable (WCE) option. This is an optional entry. If not specified, default
values are used. Values can be ON or OFF, with the following defaults:
• For disks that support WCE, the default value is OFF.
• For disks that do not support WCE, this field is left blank.
Table 5: DISKFACTOR Model, Speed, Controller, Subtype and Seek Times (page 47) lists the disks
supported by TCM, with their model numbers, rotational speeds, controllers, and subtypes.
NOTE: If SSD disk (EO0200FBRVV) is used in the DISKCONVERTTO statement, then use the
following DISKCONVERTTO syntax:
DISKCONVERTTO m [w] [p]
where:
m
is the disk model number.
This entry can contain only one disk model number.
[w]
specifies the write cache enable (WCE) option. This is an optional entry. If not specified, default
values are used. Values can be ON or OFF. For disks that support WCE, the default value is
OFF.
[p]
is the number of partitions in the disk. Valid values are 1 to 8. This is an optional entry.
Default value is 1.
SSDDISKFACTOR Entry
SSDDISKFACTOR is an optional entry that can be used to override the read and write speed up
factors of an existing disk model and replace them with user-specified values.
The syntax follows:
SSDDISKFACTOR m [r] [w]
where:
m
is the disk model number for which the default RPM and controller type changes. Acceptable
values for SSDDISKFACTOR Model, Speed, Controller, Subtype and Seek Times are shown in
Table 5 (page 47).
[r]
is the read speed up factor. This is a numeric value and is in the format X.XX, where X is any
number, for example 1.34.
[w]
is the write speed up factor. This is a numeric value and is in the format X.XX, where X is any
number, for example 1.34.
NOTE: [r] and [w] are optional entries. If you do not specify a value to these entries, the default
value is 1.
DISKFACTOR Entry
DISKFACTOR is an optional entry that can be used to override the rotational speed and controller
type of an existing disk model number and replace them with user-specified values.
46 Using MeasTCM