topic Happy New Year - "Get-NaSnapshot... | -last 1" returns Dec and not Jan in Microsoft Virtualization Discussions

Happy New Year - "Get-NaSnapshot... | -last 1" returns Dec and not Jan

BrendonHiggins — Thu, 05 Jun 2025 06:38:27 GMT

The powershell script I use to update my snapvault has stopped working. A brief investigation shows that the snapshot name selection process has failed.

I use the commandlet

$smeEXsnap = Get-NaSnapshot exdb1 exchsnap__* | select-object Name -last 1

it retuns "exchsnap__exmbx1_12-31-2011_23.40.13__daily"

Snaps on filer

SAN> snap list -n exdb1

Volume exdb1

working...

date name

------------ --------

Jan 02 23:43 exchsnap__exmbx1_01-02-2012_23.40.13__daily

Jan 02 00:01 exchsnap__exmbx1_01-01-2012_23.40.14__daily

Jan 01 00:11 exchsnap__exmbx1_12-31-2011_23.40.13__daily (snapvault)

Dec 30 23:42 exchsnap__exmbx1_12-30-2011_23.40.13__daily

The work around is simple in that I can manually run my script with the snapshot name to update the snapvaults and then remove the snapshots from last year. But I would like to know if this is a 'bug' in the commandlet or I need to change my code so that 'last' also takes in the year value.

Thanks

Bren

PS - Happy new year all

Re: Happy New Year - "Get-NaSnapshot... | -last 1" returns Dec and not Jan

TRANDUCMILLE — Mon, 16 Jan 2012 06:19:14 GMT

I am also getting this trouble since I can not include in the year value into result list? Is there any solution to solve that?

Thanks

Re: Happy New Year - "Get-NaSnapshot... | -last 1" returns Dec and not Jan

mladen_zecevic — Mon, 16 Jan 2012 09:35:03 GMT

You have to sort the results by date and then select last 1.

Get-NaSnapshot volname | Sort-Object Created | Select-Object -last 1

regards,

Mladen

Re: Happy New Year - "Get-NaSnapshot... | -last 1" returns Dec and not Jan

drdabbles — Fri, 20 Jan 2012 16:09:30 GMT

This bug bit me too, because I have scripts that automatically mount snapshots and do some processing for a SQL process I've created. Once the December backups were gone, it started working again. Fortunately, I'd fixed the problem by then.

"Sort-Object Created" will not work. "Created" is not the actual field name for the date the snapshot was created, even though it's column display name is "Created".

I work around the sorting problem by doing this...

get-nasnapshot -Name volname | Where { $_.Name -like "sqlsnap*" } | Sort-Object AccessTime,Name -descending | Select -Last 1

This will get me any snapshot named "sqlsnap*", so I'm filtering out the automatic snapshots for my snapmirror process, etc.. Then I sort the object from most recent to least recent by the date the snapshot was created and the name of the snapshot. The name is just in there as a safety measure, I guess. There's little chance that two snapshots could have the same exact creation time.