Re: Disk IO 100% busy - SAN issue?
- From: Michael Dinh <mdinh235@xxxxxxxxx>
- To: Christopher.Taylor2@xxxxxxxxxxxx
- Date: Thu, 15 Nov 2012 06:31:25 -0800
Thanks Chris for the information as it is something I will keep in mind for
future events and know what to ask for.
I am on a need to know basis and system admin thinks it is probably du to
cabling.
From my understanding, the migration was to a new server using the same
storage and migration to new storage will be later.
On Thu, Nov 15, 2012 at 5:39 AM, <Christopher.Taylor2@xxxxxxxxxxxx> wrote:
> Michael,
>
> We probably need the storage type.
>
> For example we have a similar issue with AIX going to a new EMC VMAX 20K.
>
> The monitoring for that is very hard because it uses hdiskpower adapters
> between the host and the storage - so the "disks" only show up through the
> hdiskpower IO adapters on fscsi 1,2,3, and 4 (4 io adapters).
>
> The "disks" (hdisk01, hdisk02, hdisk03) in this case are really luns of
> many,many devices at EMC layer and the EMC layer uses Fast Virtual
> Provisioning from SATA (lower tier) to Fiber (middle tier) to SSD (upper
> tier).
>
> So it would be good to provide an update:
>
> - Number of IO adapters and type
> - LUNs present at the host
> - LUN configuration at the storage
> - Fast VP enabled or no? Is all storage the same? SSDs, SATA or what?
> - Storage Vendor and Make/Model
>
> Just off the top of my head here.
>
> Chris
>
> -----Original Message-----
> From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
> On Behalf Of Michael Dinh
> Sent: Thursday, November 15, 2012 7:28 AM
> To: oracle-l
> Subject: Disk IO 100% busy - SAN issue?
>
> Hello,
> I would appreciate any feedback from storage experts on my post
> http://mdinh.wordpress.com/2012/11/15/san-insanity/ SAN Insanity.
>
> Thanks Michael.
>
>
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>
>
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