System Buffer Flushing Function; Figure 4.77 Ldm Volume Flushing - Hitachi TAGMASTORE MK-90RD011-25 User Manual

4.18.3 System Buffer Flushing Function

The logical drive to be flushed can be specified by the following two methods. One method
is that logical drive (e.g., G:\hd1 drive, as below) is specified immediately, but this method
must know about the logical drive which corresponds to a group before executes the sync
command. Also the volume is mounting by a directory and this method requires to find its
volume name. To solve such a complication, CCI supports new method that flushes the
system buffer associated to a logical drive through finding a volume{guid} which corresponds
to a group of the configuration file. This method does not depend on mounted point, so that
it is possible to flush the volume mounted by a directory. This method is supported to be
specified a group to the "raidscan -find sync" command.
Mounted point
Drive
G:\hd1 F: E:
Letter
Volume{guid}
NT File system Buffer
\Device\HarddiskDmVolumes
\Device\
LDM
\Device\
\...\VolumeX or
Volumes HarddiskVolumeX
HarddiskVolumeY
\...\StripeX
PhysicalDriveY
Physicall
Volumes
\Device\HarddiskX\DR??
Mirrored Volume
ORB ORA
Group in CCI configuration file

Figure 4.77 LDM Volume Flushing

The following example flushes the system buffer associated to ORB group through $Volume.
raidscan -pi $Volume -find sync -g ORB
[SYNC] : ORB ORB_000[-] -> \Dmt1\Dsk1 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
[SYNC] : ORB ORB_001[-] -> \Dmt1\Dsk2 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
[SYNC] : ORB ORB_002[-] -> \Dmt1\Dsk3 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
The following example flushes the system buffer associated to all groups for the local
instance.
raidscan -pi $Volume -find sync
[SYNC] : ORA ORA_000[-] -> \Vol44\Dsk0 : Volume{56e4954a-28d5-4824-a408-3ff9a6521e5d}
[SYNC] : ORA ORA_000[-] -> \Vol45\Dsk0 : Volume{56e4954a-28d5-4824-a408-3ff9a6521e5e}
[SYNC] : ORB ORB_000[-] -> \Dmt1\Dsk1 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
[SYNC] : ORB ORB_001[-] -> \Dmt1\Dsk2 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
[SYNC] : ORB ORB_002[-] -> \Dmt1\Dsk3 : Volume{bf48a395-0ef6-11d5-8d69-00c00d003b1e}
Note: Windows NT does not support the LDM volume, so the user must specify $LETALL
instead of $Volume.
Hitachi Command Control Interface (CCI) User and Reference Guide 311