Sun Storage 5210 NAS Appliance
 
Sun Storage 5310 NAS Appliance
 
Sun Storage 5320 NAS Gateway/Cluster System
 
Sun Storage 5320 NAS Appliance
 
Sun Storage 5310 NAS Gateway System
 

GCS>Sun Microsystems>Storage - Disk>Network Attached Storage
 

This is due to a new checkpoint format being used in 4.2x. This format is incompatable with the NAS os 4.12 and below.  If you try to downgrade the NAS os to this rev with new checkpoints in existance, the following error will be produced.
"Cannot reboot to previous version                                      |
Volumes with new checkpoint format exist"

NOTE: USING THIS PROCEDURE DELETES ALL CHECKPOINT DATA!
GUI:
----
1. Expand the "File Volume Operations" selection in the lefthand
window pane.
2. Choose "Edit Volume Properties"
3. In the righthand window pane, select each listed volume and
review the "Enable Checkpoint" check box.  If this field is
checked, uncheck it.  Make necessary changes to disable checkpoints
on all volumes.
4. Press the "Apply" button.  Once changes have been saved, you will
be able to boot the prior 4.1x version of the NAS os.
TELNET MENU:
------------
1. Telnet to NAS, and log in as administrator
2. Launch the menu by hitting return at the [Menu]
prompt
3. Selct "D. Disks & Volumes"
4. Select the letter beginning with the first letter representing the
file volumes (do not manipulate /cvol or /dvol)
5. A list of volumes configured on the selected disk will be
displayed in table form. Select "1. Edit"
6. At this point, the individually listed disks can be manipulated.
for the first hilighted volume, select "6. Checkpoints", "1. Edit"
and verify that the first editable field "Enable Checkpoints" is set to
NO.
7. If change is required, enter "N" to set the field to "No" and save the
change by entering "7. Save Changes"
NOTE: This process must be done for each configured volume
When all checkpoints have been disabled, you will be able to boot the
prior 4.1x version of the NAS os
COMMAND LINE:
-------------
1. Telnet to NAS, and log in as administrator
2. Issue the mount command which lists all currently mounted volumes and
associated checkpoints. This output will allow you to idetify checkpoints
created using the new format.
5310 > mount
volume       type    use%     free/size        requests    origin
/NewVl        sfs2      1% 133.427G/134.382G       123+0    isp1d022,4
:
:
/upgradeckpt.chkpnt sfs2cpv 100%        0/5.878M           7+0    /upgradeckpt
/virusscan    sfs2     47%  24.039M/45.195M     249002+1    isp1d021,2
2%      10K/11K
/virusscantgt sfs2     47%  24.191M/45.195M     508797+1    isp2d001,3
2%      10K/11K
Checkpoints are identifed as a type of "sfs2cpv"
Make note of all volumes that have checkpoints. These
checkpoints must be removed to allow the downgrade.
5310 > chkpntabort /upgradeckpt
All checkpoints on /upgradeckpt will be
deleted and can not be recovered.
You must promptly run the file volume
check-and-repair (fsck) procedure.
Do you really want to abort checkpoints? ? [no] y
/upgradeckpt checkpoints aborted
If you want to verify that the checkpoints have indeed been
removed, issue the mount command again and note that all the
volumes of type sfs2cpv are nolonger listed.
5310 > mount
volume       type    use%     free/size        requests    origin
/NewVl        sfs2      1% 133.427G/134.382G       123+0    isp1d022,4
:
:
/virusscan    sfs2     47%  24.039M/45.195M     249002+1    isp1d021,2
2%      10K/11K
/virusscantgt sfs2     47%  24.191M/45.195M     508797+1    isp2d001,3
2%      10K/11K
You will now be able to reboot to the previous4.1x version of the NAS os

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