Disk Cache Problems - Juniper MEDIA FLOW CONTROLLER 2.0.4 - ADMINISTRATOR S GUIDE AND CLI Administrator's Manual

Media Flow Controller Configuration Tasks (CLI)
9. Enable or re-enable a disk for caching.
media-cache disk <cache_name> cache enable
Example:
test-vos (config) # show media-cache disk list
Device
------
dc_1
dc_2
Total Free Space:
test-vos (config) # media-cache disk dc_2 cache disable
Disk Cache Disabled
test-vos (config) # media-cache disk dc_2 status inactive
Disk Deactivated
test-vos (config) # media-cache disk mount-new
Message sent to detect for new disks
Please check disk state for status
test-vos (config) # show media-cache disk list
Device
------
dc_1
dc_2
tivated
Total Free Space:
test-vos (config) # media-cache disk dc_2 status active
Disk Activated
test-vos (config) # media-cache disk dc_2 format
Disk Formatted
test-vos (config) # media-cache disk dc_2 cache enable
Disk Cache Enabled
test-vos (config) # show media-cache disk list
Device
------
dc_1
dc_2
Total Free Space:

Disk Cache Problems

These are the disk state messages you might get when managing the media-cache disk.
DM2_MGMT_STATE_CACHEABLE = "disk cacheable, but cache not enabled"
DM2_MGMT_STATE_INVAL_FORMAT_BEFORE_MOUNT and
DM2_MGMT_STATE_FORMAT_UNKNOWN_AFTER_MOUNT = "disk has wrong format
hence not cacheable"
DM2_MGMT_STATE_DEACTIVATED = "disk has been deactivated";
DM2_MGMT_STATE_ACTIVATED = "disk has been activated";
94 Managing the Media Flow Controller Disk Cache (CLI)
Type Tier Active
---- ---- ------
SATA Tier-3 yes
SATA Tier-3 yes
107486 MiB
Type Tier Active
---- ---- ------
SATA Tier-3 yes
SATA Tier-3 no
107486 MiB
Type Tier Active
---- ---- ------
SATA Tier-3 yes
SATA Tier-3 yes
107486 MiB
Media Flow Controller Administrator's Guide
Cache Free Space
----- ----------
yes 38890 MiB
yes 68668 MiB
Cache Free Space
----- ----------
yes 38890 MiB
no -
Cache Free Space
----- ----------
yes 38890 MiB
yes 68668 MiB
Copyright © 2010, Juniper Networks, Inc.
State
-----
cache running
cache running
State
-----
cache running
disk has been deac
State
-----
cache running
cache running