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Deleting a snapshot, To reset a snapshot now, To schedule a reset snapshot task

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Deleting a snapshot When you delete a snapshot, all data uniquely associated with that snapshot is deleted and associated space in the snap pool is freed for use. Snapshots can be deleted in any order, irrespective of the order in which they were created. CAUTION: Deleting a snapshot removes its mappings and deletes its data. To delete a snapshot 1. Verify that hosts are not accessing the snapshot that you want to delete. 2. In the Configuration View panel, right-click a snapshot and select Provisioning > Delete Snapshot. 3. In the main panel, select the snapshot to delete. 4. Click Delete Snapshot(s). 5. Click OK to continue; otherwise, click Cancel. If you clicked OK, a processing dialog appears. When the snapshot is deleted it is removed from the table and from the Configuration View panel. When processing is complete a success dialog appears. 6. Click OK. Resetting a snapshot Instead of taking a new snapshot of a volume, you can replace the data in a snapshot with the current data in the source volume. The snapshot's name and mapping settings are not changed. The snapshot data is stored in the source volume's snap pool. CAUTION: To avoid data corruption, before resetting a snapshot it must be unmounted from hosts. You can reset a snapshot now or schedule the reset task. To reset a snapshot now 1. Unmount the snapshot from hosts. 2. In the Configuration View panel, right-click a snapshot and select Provisioning > Reset Snapshot. 3. In the main panel, select Now. 4. Click Reset Snapshot. A message indicates whether the task succeeded or failed. 5. Optionally, remount the snapshot. To schedule a reset snapshot task 1. In the Configuration View panel, right-click a snapshot and select Provisioning > Reset Snapshot. 2. In the main panel, select Scheduled. 3. Set the options: • Start Schedule. Specify a date and a time in the future for the schedule to start running. • Date must use the format yyyy-mm-dd. • Time must use the format hh:mm followed by either AM, PM, or 24H (24-hour clock). For example, 13:00 24H is the same as 1:00 PM. • Recurrence. Specify how often the task should run. It is not recommended to set the interval to less than two minutes. • Time Constraint. Specify a time range within which the task should run. • Date Constraint. Specify days when the task should run. • End Schedule. Specify when the task should stop running. 4. Click Reset Snapshot. If the task succeeded, the schedule is saved and can be viewed in the overview panel for the snapshot or system. 5. Make a reminder to unmount the snapshot before the scheduled task runs. HP StorageWorks 2000 G2 Modular Smart Array Reference Guide 53

Section	Page
Contents	3
Figures	7
Tables	9
About this guide	11
Intended audience	11
Prerequisites	11
Related documentation	11
Document conventions and symbols	11
HP technical support	12
Product warranties	12
Subscription service	12
HP web sites	12
Documentation feedback	12
Getting started	13
Configuring and provisioning a new storage system	13
Browser setup	13
Signing in	13
Tips for signing in and signing out	14
Tips for using the main window	14
Tips for using the help window	15
System concepts	15
About user accounts	15
About vdisks	16
About spares	16
About volumes	17
About hosts	17
iSCSI host security	17
About volume mapping	18
About volume cache options	19
Using write-back or write-through caching	19
Optimizing read-ahead caching	19
About the Snapshot feature	20
About the Volume Copy feature	21
About the VDS and VSS hardware providers	23
About RAID levels	23
About size representations	25
About the system date and time	25
About storage-space color codes	26
About vdisk reconstruction	26
About data protection in a single-controller storage system	27
Configuring the system	29
Using the Configuration Wizard	29
Step 1: Starting the wizard	29
Step 2: Change default passwords	29
Step 3: Configuring network ports	29
Step 4: Enabling system-management services	29
Step 5: Setting system information	30
Step 6: Configuring event notification	30
Step 7: Configuring host ports	31
Step 8: Confirming configuration changes	32
Installing a license	32
Configuring system services	33
Changing management interface settings	33
Configuring email notification	34
Configuring SNMP notification	34
Configuring user accounts	34
Adding users	34
Modifying users	35
Removing users	36
Configuring system settings	36
Changing the system date and time	36
Changing host interface settings	37
Changing network interface settings	38
Setting system information	38
Configuring advanced settings	39
Changing disk settings	39
Configuring SMART	39
Configuring dynamic spares	39
Configuring the EMP polling rate	39
Changing cache settings	40
Changing the synchronize-cache mode	40
Changing the missing LUN response	40
Controlling host access to the system's write-back cache setting	40
Changing auto-write-through cache triggers and behaviors	41
Configuring partner firmware update	41
Configuring system utilities	41
Configuring background scrub	41
Configuring utility priority	42
Configuring a vdisk	42
Managing dedicated spares	42
Changing a vdisk's name	43
Changing a vdisk's owner	43
Configuring a volume	43
Changing a volume's name or OpenVMS UID	43
Changing a volume's cache settings	44
Provisioning the system	45
Using the Provisioning Wizard	45
Step 1: Starting the wizard	45
Step 2: Specifying the vdisk name and RAID level	45
Step 3: Selecting disks	46
Step 4: Defining volumes	46
Step 5: Setting the default mapping	46
Step 6: Confirming vdisk settings	47
Creating a vdisk	47
Deleting vdisks	47
Expanding a vdisk	48
Before expanding a vdisk	48
Managing global spares	48
Creating a volume set	49
Creating a volume	49
Deleting volumes	50
Changing a volume's default mapping	50
Changing a volume's explicit mappings	51
Expanding a volume	51
Creating multiple snapshots	52
Creating a snapshot	52
Deleting a snapshot	53
Resetting a snapshot	53
Creating a volume copy	54
Aborting a volume copy	55
Rolling back a volume	55
Adding a host	56
Removing hosts	56
Changing a host's name	57
Changing host mappings	57
Configuring CHAP	58
Deleting schedules	58
Using system tools	59
Updating firmware	59
Updating controller module firmware	59
Updating expansion module firmware	59
Updating disk firmware	60
Saving logs	61
Resetting a host port	61
Rescanning disk channels	62
Clearing disk metadata	62
Restarting or shutting down controllers	62
Restarting	62
Shutting down	63
Verifying a vdisk	64
Scrubbing a vdisk	64
Removing a vdisk from quarantine	65
Viewing system status	67
Viewing information about the system	67
System properties	67
Enclosure properties	67
Disk properties	67
Vdisk properties	67
Volume properties	67
Snap-pool properties	67
Snapshot properties	68
Schedule properties	68
Configuration limits	68
Licensed features	68
Version properties	68
Viewing the system event log	68
Viewing information about all vdisks	69
Viewing information about a vdisk	70
Vdisk properties	70
Disk properties	71
Volume properties	72
Snap-pool properties	72
Viewing information about a volume	72
Volume properties	72
Mapping properties	72
Schedule properties	73
Viewing information about a snapshot	73
Snapshot properties	73
Mapping properties	74
Schedule properties	74
Viewing information about all hosts	74
Viewing information about a host	74
Host properties	75
Mapping properties	75
Viewing information about an enclosure	75
SNMP reference	77
Standard MIB-II behavior	77
Enterprise traps	77
FA MIB 2.2 SNMP behavior	78
External details for certain FA MIB 2.2 objects	83
External details for connUnitRevsTable	83
External details for connUnitSensorTable	84
External details for connUnitPortTable	85
Configuring SNMP event notification in SMU	85
SNMP management	85
Enterprise trap MIB	85
FA MIB 2.2 and 4.0 Differences	87
Event code reference	89
Using FTP to download logs and update firmware	107
Downloading system logs	107
Updating controller module firmware	108
Updating expansion module firmware	109
Updating disk firmware	110
Installing a license file	111
Glossary	113

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HP StorageWorks 2000 G2 Modular Smart Array Reference Guide

Deleting a snapshot

When you delete a snapshot, all data uniquely associated with that snapshot is deleted and associated

space in the snap pool is freed for use. Snapshots can be deleted in any order, irrespective of the order in

which they were created.

CAUTION:

Deleting a snapshot removes its mappings and deletes its data.

To delete a snapshot

Verify that hosts are not accessing the snapshot that you want to delete.

In the Configuration View panel, right-click a snapshot and select

Provisioning > Delete Snapshot

In the main panel, select the snapshot to delete.

Click

Delete Snapshot(s)

Click

to continue; otherwise, click

Cancel

. If you clicked OK, a processing dialog appears. When

the snapshot is deleted it is removed from the table and from the Configuration View panel. When

processing is complete a success dialog appears.

Click

Resetting a snapshot

Instead of taking a new snapshot of a volume, you can replace the data in a snapshot with the current

data in the source volume. The snapshot's name and mapping settings are not changed. The snapshot

data is stored in the source volume's snap pool.

CAUTION:

To avoid data corruption, before resetting a snapshot it must be unmounted from hosts.

You can reset a snapshot now or schedule the reset task.

To reset a snapshot now

Unmount the snapshot from hosts.

In the Configuration View panel, right-click a snapshot and select

Provisioning > Reset Snapshot

In the main panel, select

Now

Click

Reset Snapshot

. A message indicates whether the task succeeded or failed.

Optionally, remount the snapshot.

To schedule a reset snapshot task

In the Configuration View panel, right-click a snapshot and select

Provisioning > Reset Snapshot

In the main panel, select

Scheduled

Set the options:

•

Start Schedule. Specify a date and a time in the future for the schedule to start running.

•

Date must use the format

yyyy

•

Time must use the format

followed by either AM, PM, or 24H (24-hour clock). For

example, 13:00 24H is the same as 1:00 PM.

•

Recurrence. Specify how often the task should run. It is not recommended to set the interval to less

than two minutes.

•

Time Constraint. Specify a time range within which the task should run.

•

Date Constraint. Specify days when the task should run.

•

End Schedule. Specify when the task should stop running.

Click

Reset Snapshot

. If the task succeeded, the schedule is saved and can be viewed in the overview

panel for the snapshot or system.

Make a reminder to unmount the snapshot before the scheduled task runs.