You might want to keep in mind that the X4500 was a ~2006 box, and had only 
PCI-X slots.

Or, at least, that's what the 3 Iv'e got have.  I think the X4540 had PCIe, but 
I never got one of those.  :-(

I haven't seen any cache accelerator PCI-X cards.

However, what I've done on the X4500 systems in the lab is to use two drives on 
the system disk bus for the cache and log devices (each).

With the 175 release of Solaris 11, I have literally seen a scrub running at 
960mb/sec, and around 400mb/sec for 10ge NFS.

On Oct 14, 2011, at 12:25 PM, Erik Trimble wrote:

> On 10/14/2011 5:49 AM, Darren J Moffat wrote:
>> On 10/14/11 13:39, Jim Klimov wrote:
>>> Hello, I was asked if the CF port in Thumpers can be accessed by the OS?
>>> In particular, would it be a good idea to use a modern 600x CF card
>>> (some reliable one intended for professional photography) as an L2ARC
>>> device using this port?
>> I don't know about the Thumpers internal CF slot.
>> I can say I have tried using a fast (at the time, this was about 3 years 
>> ago) CF card via a CF to IDE adaptor before and it turned out to be a really 
>> bad idea because the spinning rust disk (which was SATA) was actually faster 
>> to access.  Same went for USB to CF adaptors at the time too.
> Last I'd checked, the CF port was fully functional.
> However, I'd not use it as L2ARC (and, certainly not ZIL).   CF is not good 
> in terms of either random write or read - professional-grade CF cards are 
> optimized for STREAMING write - that is, the ability to write a big-ass JPG 
> or BMP or TIFF as quickly as possible.  The CF controller isn't good on lots 
> of little read/write ops.
> In Casper's case, the CF->IDE adapter makes this even worse, since IDE is 
> spectacularly bad at IOPS.
> I can't remember - does the X4500 have any extra SATA ports free on the 
> motherboard? And, does it have any extra HD power connectors?
> Is a great way to add a 2.5" drive slot, but it's just a physical slot 
> adapter - you need to attach a standard SATA cable and HD power connector to 
> it.
> If that's not an option, find yourself a cheap PCI-E adapter with eSATA ports 
> on it, then use an external HD enclosure with eSATA for a small SSD.
> As a last resort, remove one of the 3.5" SATA drives, and put in an SSD in a 
> 2.5"->3.5" converter enclosure.
> Remember, you can generally get by fine with a lower-end SSD as L2ARC, so a 
> 60GB  SSD should be $100 or less.
> -Erik
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Gregory Shaw, Enterprise IT Architect
Phone: (303) 246-5411
Oracle Global IT Service Design Group
500 Eldorado Blvd, UBRM02-157      (work)
Broomfield, CO 80021                 (home)
Hoping the problem magically goes away by ignoring it is the "microsoft 
approach to programming" and should never be allowed. (Linus Torvalds)          

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