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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!
 
 
 
 
 

18 Posts

January 16th, 2006 11:00

Thanks.
 
Just one more question regarding my original post.
 
Why not just swap out drive 2 instead of both 1 & 2, replace with a 36G, let it mirror the flare over.
Then put 2 to slot 0, and place two new 36G in slot 1 & 2, and mirror again.
 
Btw, my 36G for sure is 520 as they are CLAR DE18 as listed in the SAN 4.06 compatibility list.
 

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3 Points

January 16th, 2006 11:00

There are a few ways that will work.

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).

18 Posts

January 16th, 2006 11:00

How come we can no longer access to the Powervault DE84 update on Dell's support site?
The link has been removed somehow.

6 Operator

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9.3K Posts

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January 16th, 2006 17:00

The flare is a 3-drive mirror. With normal data LUNs you'll see the rebuild in the data admin event logs. The flare I don't believe you'll see logged in the event logs if it has finished adding mirrors.

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.

18 Posts

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.

6 Operator

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9.3K Posts

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January 17th, 2006 16:00

I have no idea. I did a search for DE84 on the Dell site, and find a few hits, but when you try to follow them, they say the file is no longer available. I don't know the filename that it had, as you could try the Dell FTP server and look there for the filename.

18 Posts

January 18th, 2006 00:00

Can someone from Dell help us to locate this file, or will someone help me by sending me the email attachment pleaes?

18 Posts

January 19th, 2006 01:00

Please help me to get a version of DE84 firmware.
 
Thanks a lot in advance.
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