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January 16th, 2006 02:00
Help with PV650F flare drive migration
Current situation:
1 units 18GB flare drive with v. 5.11.17 flare (DE84) on it and 2 mirrors 18GB drives.
Want to:
I have 3 x 36GB st3366605fc DE18 drives no flare
How can I migrate the 18GB to 36GB, so I will be running the 36GB with flares instead?
I am thinking:
Step 1. With the 2 18GB flare drive inside, swap the 3rd 18GB with 36GB, so the 36GB will have the flare
Step 2: Put the flared 36GB in slot 1, and put the 2 extra 36GB in slot 2 & 3, and turn on 650F, this will flare the rest
Problem:
1. Will this work?
2. Source is 18GB, Dest. drive is 36GB, conflict?
3. Source 18GB is DE84, Dest. drive is 36GB DE18 Clar, conflict?
Thank you very much!
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ctchang
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January 16th, 2006 11:00
Dev Mgr
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January 16th, 2006 11:00
One option:
- have a (redundant) data LUN bound on the 3 drives (more than just these 3 is fine too)
- swap 1 drive at a time and let each rebuild all the way
Notes: If you currently don't have any LUNs on these 3 drives, just bind a single 2GB (putting 1 GB on each drive) raid 5. This is quick to rebuild and does what it needs to. After you're done swapping all 3 drives, delete the LUN and use the 'new' 36GB drives for new LUNs
Another option:
- power down the array
- replace drives 1 and 2 (leaving drive 0) and power up the array
- Give the system a few minutes to let it mirror the flare to drives 1 and 2 (10 minutes should be a 'safe' time to assume it's finished (except for monitoring the drive activity lights I don't know of a reliable way to determine if it's finished, and I'd be conservative with determining if it's no longer blinking))
- Power down and move drive 1 or 2 to slot 0
- put in the 3rd 36GB drive into the opened slot
- power up
- give the system a few minutes again to rebuild the triple mirror
The first option is more 'reliable' in my opinion, but only because it's easier to see when the rebuild is finished. Both should work fine tho.
Do keep track of those 3 18GB drives, because if after the swap if you find the unit will not boot to any flare, you will have to revert back to your 18's to see what the problem is with the 36's (only thing I can think of is if the 36's are formatted at 512 bytes/sector instead of the required 520 bytes/sector (the firmware version makes it likely that they are 520, but it's not a guarantee).
ctchang
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January 16th, 2006 11:00
Dev Mgr
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January 16th, 2006 17:00
The 'rebuild' doesn't always happen right away (I ran into this), even if you see what looks like it is disk activity for a rebuild. After having swapped all 3 drives 1 at a time (w/o a data LUN on there), I decided to reboot the array with the 3 'new' drives to make sure it worked, and the array wouldn't boot. I ended up finding out that it mirrors the flare for sure (easily recognizable) at boot and when it rebuilds a data LUN. Swapping 1 drive at a time w/o a data LUN forcing an immediate rebuild may work, but not sure what kind of wait time you will have to calculate for.
ctchang
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January 17th, 2006 02:00
Hi Dev Mgr,
Do you know what happen to the download link of firmware of DE84?
Where can we get it again?
Thanks.
Dev Mgr
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January 17th, 2006 16:00
ctchang
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January 18th, 2006 00:00
ctchang
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January 19th, 2006 01:00