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тАО09-08-2005 08:44 PM
тАО09-08-2005 08:44 PM
windows format of eva 5000 lun slow
When I came to format the disks under disk management it took a long time.
How long should it take to format a 50GB Lun?
Does anyone have any tips for lun setup on the EVA or possible tuning of the fc card on windows.
thanks
Trev
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тАО09-08-2005 10:45 PM
тАО09-08-2005 10:45 PM
Re: windows format of eva 5000 lun slow
It sounds like that initialization of Vdisk not complete... What type of Vraid do you use, how much drivers in Disk group where your Vdisk reside, what protection level is being use? All of this impact to initialization process. View status of your Vdisk in Command View EVA. What about your SAN design and FC HBA model?
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тАО09-08-2005 11:05 PM
тАО09-08-2005 11:05 PM
Re: windows format of eva 5000 lun slow
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тАО09-08-2005 11:07 PM
тАО09-08-2005 11:07 PM
Re: windows format of eva 5000 lun slow
Usually you will do a rescan, choose a basic disk, write the windows signature, partition the LUN and format it. Don't forget to check "Quickformat" otherwise it will need several minutes.
On the EVA side, it is create Disk, Enter a Name, choose Diskgroup, Enter VRAID level, enter Size, choose the Host to present to - finished.
Out of the head i have no idea about some possible tuning tips.
hth
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тАО09-08-2005 11:36 PM
тАО09-08-2005 11:36 PM
Re: windows format of eva 5000 lun slow
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тАО09-08-2005 11:44 PM
тАО09-08-2005 11:44 PM
Re: windows format of eva 5000 lun slow
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=PSD_OI040301_CW02
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тАО10-18-2005 11:02 AM
тАО10-18-2005 11:02 AM
Re: windows format of eva 5000 lun slow
did you get a solution to your formatting problem yet?
I have the same problem. It takes an awfull long time to format a 200GB Vraid5 Volume. It's not a matter of minutes - it is a matter of hours. If i use "Quickformat" it finishes within minutes.
I do not have performance problems during runtime - it is just the formatting process that is so slow.
Regards
Manfred
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тАО10-18-2005 11:05 PM
тАО10-18-2005 11:05 PM
Re: windows format of eva 5000 lun slow
I actually got HP to run a comparable test in their labs.They found it took 2hr 32min to format 150GB. No answer was given as to why it takes so long but it does appear to be normal. I would also use diskpart to correctly align the partition ( see link above) as this was also suggested by the HP engineer.
An interesting point I found in testing. If you create a 1GB LUN to NT .Format is , then extend the LUN on the EVA.When you extend the partition on NT it does it instantly.
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тАО10-18-2005 11:18 PM
тАО10-18-2005 11:18 PM
Re: windows format of eva 5000 lun slow
It actually took me 1.5 hours to format a 100GB Volume. And that time is almost constant, if i repeat the format-operation a second or third time.
I worry about Windows 2003 Automatic Server Recovery issues, if an EVA System is involved on the Recovery Site. The Windows 2003 ASR process tries to format all visible volumes attached to Smart Array controller and presented via EVA via asr_fmt.exe. I have no option to interfere with this operation - i can just sit and wait almost a day until my EVA disks are formated before further disaster revovery operations can continue.
Anyway, I opened a Support Call to get a proper solution.
Regards
Manfred
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тАО10-18-2005 11:24 PM
тАО10-18-2005 11:24 PM
Re: windows format of eva 5000 lun slow
If you manage to get a decent answer from HP I would really like to know it.
regards
Trevor