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тАО08-22-2004 11:31 PM
тАО08-22-2004 11:31 PM
Upgrading RAID 5 with a new disk using ML350.
I'm quite a newbie in matters concerning servers and i've got to insert a new disk into the ML350 server using RAID 5.
It has 3 disks: 18.2 GB 10K Ultra SCSI and we need a new one with 36GB.
Considering this i've got two major doubts:
1) What kind of disks are compatible with the 18GB 10K Ultra SCSI to use with RAID5.
2) Is it possible to have a bigger disk in the RAID5 (ex: adding 36GB disk to a combination of 3 18GB)
Thanks in advance.
Pedro Silva
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тАО08-23-2004 12:49 AM
тАО08-23-2004 12:49 AM
Re: Upgrading RAID 5 with a new disk using ML350.
Yes, you can install this disk and use it to expand the existing array. But, you will loose 18GB of space. The larger disk will only show up as an extra 18GB once it is added to the capacity of the RAID5.
If you need an extra 36GB of space on your array, you would need to add another disk to the array. Alternatively, if you need a total of 36GB of space in a RAID configuration, you could add two 36GB drives in a RAID1 (mirror) and achive the needed space.
You could also add the new 36GB drive as a RAID0 (or JBOD) and get the needed space, but without the redundancy of a true RAID array.
Here are some documents that may help explain some of the alternatives described:
RAID Drive Replacement:
ftp://ftp.compaq.com/pub/products/servers/proliantstorage/drives-enclosures/hp%20hard%20drive%20replacement.pdf
Advantages of RAID ADG, RAID5 or RAID1+0
ftp://ftp.compaq.com/pub/products/servers/proliantstorage/arraycontrollers/Assessing_ADG_v_5_v_1+0.pdf
Expanding Arrays in Windows 2000:
ftp://ftp.compaq.com/pub/products/servers/proliantstorage/drives-enclosures/Procedures%20of%20expanding%20active%20volume%20with%20W2000.pdf
Array Configuration Utility Users Guide:
ftp://ftp.compaq.com/pub/supportinformation/techpubs/user_reference_guides/239449-004_rev4_us.pdf
I hope that this reading material helps you in your planning. -john
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тАО08-23-2004 12:59 AM
тАО08-23-2004 12:59 AM
Re: Upgrading RAID 5 with a new disk using ML350.
Now my only remaining doubt is about the drives compatibility:
Considering that the existing drives are 10K Ultra SCSI can the new drive be a 15K or U320?
Thanks.
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тАО08-23-2004 01:08 AM
тАО08-23-2004 01:08 AM
Re: Upgrading RAID 5 with a new disk using ML350.
The drives will be connected to a SmartArray Controller that will manage the drives. Different speeds or even protocol will not hinder you from using this drive; the new drive is backwards compatible.
Here is something else to read:
ftp://ftp.compaq.com/pub/products/servers/proliantstorage/drives-enclosures/hd-substitution.pdf
ftp://ftp.compaq.com/pub/products/servers/proliantstorage/drives-enclosures/whybuy-server-hd.pdf
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Do you need help with your HP product?
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тАО08-23-2004 02:39 AM
тАО08-23-2004 02:39 AM
Re: Upgrading RAID 5 with a new disk using ML350.
Thank you. You've been a great help.
Let's hope i'm up to the upgrade and RAID 5 installation.
Thanks.
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тАО08-23-2004 02:49 AM
тАО08-23-2004 02:49 AM
Re: Upgrading RAID 5 with a new disk using ML350.
G'luck!
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