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10-23-2006 07:55 AM
10-23-2006 07:55 AM
Maximum drives in an HSG80 Spareset
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10-23-2006 08:35 PM
10-23-2006 08:35 PM
Re: Maximum drives in an HSG80 Spareset
Robert.
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10-24-2006 01:08 AM
10-24-2006 01:08 AM
Re: Maximum drives in an HSG80 Spareset
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10-24-2006 01:11 AM
10-24-2006 01:11 AM
Re: Maximum drives in an HSG80 Spareset
Robert.
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10-24-2006 02:38 AM
10-24-2006 02:38 AM
Re: Maximum drives in an HSG80 Spareset
Maximum 128 visible LUNs/200 assignable unit numbers
Maximum 512 GB LUN capacity
Maximum 72 physical devices
Maximum 20 RAID-5 storagesets
Maximum 30 RAID-5 and RAID-1 storagesets
Maximum 45 RAID-5, RAID-1, and RAID-0 storagesets
Maximum 8 partitions of a storageset or individual disk
Maximum 6 members per mirrorset
Maximum 14 members per RAID-5 storageset
Maximum 24 members per Stripeset
Maximum 48 physical devices per striped mirrorset
It's not specified but it could be as low as 14. So test it.
Wim
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10-24-2006 02:52 AM
10-24-2006 02:52 AM
Re: Maximum drives in an HSG80 Spareset
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10-24-2006 03:16 AM
10-24-2006 03:16 AM
Re: Maximum drives in an HSG80 Spareset
You can add up to 24 members into a stripeset, up to the maximum size VMS can handle (2TB or 4TB seems to ring a bell).
Rob.
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10-24-2006 03:22 AM
10-24-2006 03:22 AM
Re: Maximum drives in an HSG80 Spareset
As long as you've got a reasonable amount of resilliance in each unit (i.e. RAID, MIRROR) then you only need a couple of disks in each SAN spareset.
Ensure these are as large and as fast (15K RPM) as your largest disks, so they can take the place of any disk.
We've had our 2 HSG80 SANs for a number of years now, and apart from when we completely rebuilt it to add more disks, I've never seen more than the odd disk go bang.
Robert.
p.s. We've recently gone to EVA, so if you're looking to purchase any HSG hardware, I have 2 full SAN's for sale!
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10-24-2006 03:26 AM
10-24-2006 03:26 AM
Re: Maximum drives in an HSG80 Spareset
We will be moving to an EVA hopfully within the next year or so.
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10-24-2006 03:47 AM
10-24-2006 03:47 AM
Re: Maximum drives in an HSG80 Spareset
Wim
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10-24-2006 04:17 AM
10-24-2006 04:17 AM
Re: Maximum drives in an HSG80 Spareset
1 TB in recent ACS versions.
> Maximum 72 physical devices
84 on an EMA-12000 with recent ACS versions.
--
> The LUN in your case is the 146GB disk hung on to the end of the cable, so this doesn't break the 512GB limit.
No, it is not the back-end disk drive. The limit is at the storage-set / unit level.
> You can add up to 24 members into a stripeset, up to the maximum size VMS can handle (2TB or 4TB seems to ring a bell).
The SCSI-2 protocol provides support for 2 TeraBytes (2^32 blocks a 512 bytes).
OpenVMS supports 1 TB volumes - looks like it cannot deal with unsigned integers ;-)
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10-24-2006 04:53 AM
10-24-2006 04:53 AM
Re: Maximum drives in an HSG80 Spareset
1 TB in recent ACS versions.
> Maximum 72 physical devices
84 on an EMA-12000 with recent ACS versions.
--
> The LUN in your case is the 146GB disk hung on to the end of the cable, so this doesn't break the 512GB limit.
No, it is not the back-end disk drive. The limit is at the storage-set / unit level.
> You can add up to 24 members into a stripeset, up to the maximum size VMS can handle (2TB or 4TB seems to ring a bell).
The SCSI-2 protocol provides support for 2 TeraBytes (2^32 blocks a 512 bytes).
OpenVMS supports 1 TB volumes - looks like it cannot deal with unsigned integers ;-)
We are at software version V88F4 for our HSG80 controllers so I should be able to create a LUN larger that 512GB correct?
Our SAN is not connected to a VMS system.
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10-24-2006 10:10 PM
10-24-2006 10:10 PM
Re: Maximum drives in an HSG80 Spareset
Rob.