3
votes
4answers
333 views

Dell R320 RAID 10 with CacheCade

I'm looking for a higher-performance build for our 1RU Dell R320 servers, in terms of IOPS. Right now I'm fairly settled on: 4 x 600 GB 3.5" 15K RPM SAS RAID 1+0 array This should give good ...
2
votes
3answers
137 views

Will a raid cache be better for performance than hard drive cache speeds?

In a device that has raid 5, and a "raid cache" of 4GB, does this help performance? I have 32MB cache hard drives but I was wanting to know if the 4GB cache will make up for the difference in ...
3
votes
3answers
1k views

What is the memory module on a RAID card needed for?

As above, what is the reason for needing a memory module on a RAID card? The card I am looking at (HP P410) comes with either 256MB or 512MB but unsure which to get and why.
3
votes
1answer
193 views

Linux implementation similar to Adaptec Intelligent Hybrid RAID?

I could explain it in my bad english, but looking at this page is the fastest way: http://www.adaptec.com/en-us/_common/hybrid-raid/ Do you know of any linux implementation for this outstanding ...
5
votes
3answers
3k views

Making SATA disk write cache safe

Supposedly (see, e.g., a question about it here), with NCQ enabled drives, the drive write cache is supposed to be safe, as in it doesn't like to the OS about data being committed to the platters when ...
4
votes
3answers
3k views

What purpose does the battery serve on a battery-backed caching RAID controller if the server is on an uninterruptible power supply?

Is the battery redundant if the server is on a properly-sized UPS? There is an option to force write-back mode and I want to understand the risk. It is my understanding that it helps against power ...
3
votes
3answers
647 views

RAID controller cache settings for SQL Server 2008

We're setting up a SQL2008 system with the following virtual disks (not including the OS/Apps volume): RAID10 Data RAID1 Logs RAID1 TempDB Any recommendations as to how we should setup the RAID ...
3
votes
3answers
914 views

Benefits of a RAID BBU in addition to a double UPS + PS system

Today I roughly measured the benefits of enabling write-back on the RAID controller on a server at work. It got no RAID battery-backup-unit (BBU) so the write-cache is currently disabled. As the ...
0
votes
2answers
3k views

What is the right cache settings for Adaptec raid cards?

There are 2 possibilites to modify cache settings in the Adaptec Storage Manager. - Physical drive - Write-back or Write-through - Logical drive - Write-back, Write-back only with battery, ...
7
votes
5answers
4k views

Squid or Other HTTP Caches with SSD Cache Store?

I'm contemplating setting up a squid (or possibly varnish) cache on a system with SSD drives. The obvious benefit is that these systems have great READ speeds and I expect my hit ratios to be fairly ...
3
votes
2answers
883 views

Can you Utilize Server RAM for NAS Cache?

I have a 4 CPU 16GB RAM system with an Areca 1230 RAID card and 6 HDs in a RAID 0+1 configuration with 1 hot spare. System has 2 onboard 1Gpbs nics I want to turn the system into a NAS. It seems ...