04-10-2011
Here's what I've found with my own personal experiences.
Most disc drives don't get out of the MB/s R/W range, so changing the amount of GB/s isn't all that big of a deal. Even the two SATA 300 discs that I have in a RAID 0 partition average about 32 MB/s R/W. and my SSD averages at about 220 MB/s, newegg goes up to about 420.
And from what I've learned with my new SSD, there is a very noticeable performance increase. VERY noticeable. Even though my SSD is a lower-end model in SATA 300 (bought from newegg at about $80) it's drastically reduced my boot time (if it's the only disc in the system, I'll get to that later, though) and the load times for most programs are nonexistant, even those on my storage drives (unless they've spun down).
The only problem that I've had with my SSD so far is with booting. The time has increased in my main computer (where it's kept) by a significant amount, however, I'm going to need to blame myself for this one, and Microsoft. You need to have your drives in AHCI mode to enable TRIM support (VERY useful for SSDs) and I want my drives in RAID, dang it! So, I need to go through Microsoft's built-in RAID drivers... Meaning that it has to declare an entire terabyte array every time it boots up.
In short: SSDs; worth every penny. SATA 600; not so much.
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AAC(4) BSD Kernel Interfaces Manual AAC(4)
NAME
aac -- Adaptec AdvancedRAID Controller driver
SYNOPSIS
aac* at pci? dev ? function ?
ld* at aac? unit ?
DESCRIPTION
The aac driver provides support for the Adaptec AAC family of SCSI and SATA RAID controllers. These controllers support RAID 0, 1, 5, 10,
and volume sets. They have four channels in the add-in version or 1-2 channels in the motherboard integrated version, and are most often
found rebadged by Dell, Hewlett-Packard or IBM. Supported controllers include:
o Adaptec AAC-364
o Adaptec SCSI RAID 2120S
o Adaptec SCSI RAID 2200S
o Adaptec SATA RAID 2410SA
o Adaptec SATA RAID 3405
o Adaptec SCSI RAID 5400S
o Dell PERC 2/Si
o Dell PERC 2/QC
o Dell PERC 3/Di
o Dell PERC 3/Si
o Dell PERC 320/DC
o Dell CERC SATA RAID 1.5/6ch
o HP NetRAID 4M
o HP ML110 G2 (Adaptec SATA RAID 2610SA)
o IBM ServeRAID 8k
Access to RAID containers is available via the ld device driver. Individual drives cannot be accessed unless they are part of a container or
volume set, and non-fixed disks cannot be accessed. Containers can be configured by using the on-board BIOS utility of the card.
DIAGNOSTICS
The adapter can send status and alert messages asynchronously to the driver. These messages are printed on the system console.
SEE ALSO
intro(4), ld(4)
HISTORY
The aac driver first appeared in NetBSD 1.6, and was based on the FreeBSD driver of the same name.
BUGS
This driver is not compatible with controllers that have version 1.x firmware. The firmware version is the same as the kernel version
printed in the BIOS POST and driver attach messages.
BSD
February 19, 2011 BSD