Backup iSCSI Target to Another iSCSI Target?

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Backup iSCSI Target to Another iSCSI Target?

Postby Synological » Tue Nov 09, 2010 11:23 pm

Greetings,

I'm contemplating getting the DX510 to be used as a backup and not as an expansion per-se. I'm using one volume on the DS1010+ (formatted as RAID6, storage purposes only, no backup) as an iSCSI target on my computer (client). What I'd like to do is create another iSCSI target from the volume on the DSX510 (formatted as RAID5 or RAID0, depending). The purpose is that the DX iSCSI will then back up the DS1010+ iSCSI (and the cloud will back up the content in the DX iSCSI). Why so complicated? I'm an all-Mac based environment, and I want to preserve HSF+ formatting.

It sounds do-able. Will this setup work? No one has confirmed, but it seems plausible.

If so, in this scenario, what are the ramifications if either or both the DS1010+ and DX510 crash in regards to data loss? Again, no confirmation, but I'd guess that because the DX510 is an expansion unit plugged into the DS100+, that it would be taken offline (if it's a separate volume, and not part of the RAID if you've combined the DS1010+ and DX510 drives in the same RAID) until the DS1010+ is repaired. If the DX510 crashes, then you'd either have to repair/rebuild it's array (whether as its own volume, or as an expansion). Data loss is dependent on RAID redundancy. Always have a backup!

~ Synological
Synology DS1010+ | 3.0 | 5x2TB WD20EARS | RAID6 | Mac OS X 10.6.4
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Re: Backup iSCSI Target to Another iSCSI Target?

Postby congo » Wed Jan 12, 2011 10:14 pm

yeah, no one can really confirm anything, try and drag synology into your thoughts !

By the way, how to you feel performance is on your WD20EARS disks? are they good? -do you experience any problems?

DS210j | DSM 4.0-2198| RAID-1 WD1003FBYX-01Y7B
DS207+ | DSM 3.1-1613| RAID-1 WD10EACS-65D6B0 (for netbackup)
Mainly using synology for NFS shares...
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Re: Backup iSCSI Target to Another iSCSI Target?

Postby Synological » Fri Jan 14, 2011 4:21 pm

performance on your WD20EARS disks?


Performance has been great. I've been using them for about 3 months now with no problems.
Synology DS1010+ | 3.0 | 5x2TB WD20EARS | RAID6 | Mac OS X 10.6.4
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Re: Backup iSCSI Target to Another iSCSI Target?

Postby congo » Fri Jan 14, 2011 5:35 pm

Synological wrote:Performance has been great. I've been using them for about 3 months now with no problems.


Then how is the LOAD_CYCLE_COUNT behaving on each disk? -the EARS series is notorious for a rapid increase in this regard when used in synology units, which is not very good. The parameter can be fetched via S.M.A.R.T. details in teh Syno GUI.

DS210j | DSM 4.0-2198| RAID-1 WD1003FBYX-01Y7B
DS207+ | DSM 3.1-1613| RAID-1 WD10EACS-65D6B0 (for netbackup)
Mainly using synology for NFS shares...
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