Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: this card has 4 ports, but does NOT support RAID 5?
Document: The ad copy says....."Add four independent SATA-I ports to your PCI equipped computer and enjoy the benefits of the optional software RAID configuration for added speed and/or data security with this adapter card from Monoprice! "......but it's not true.I received this card and it kept halting my boot up and telling me to hit F4 or CTRL-S which did not respond.
Great little RAID card. Was a bit hesitant at first, but i went ahead and pulled the trigger and bought it. I run a HAF X full size case and it has spots for 5 HDD's and 2 Hotswappable HDD bays. My Asus Crosshair IV Formula board only has 6 SATA connections, so this card was just what i needed for the extra drives my motherboard couldnt accommodate. Card was instantly recognized, but RAID utility needs to be installed from the disc itself.
4 Port SATA Serial ATA PCI RAID Controller Card - Silicon ImagePurchased this for a Home Server set-up to add some extra SATA hard drives, worked pefectly only caveat is that I had to go to the Silicon Image site to find the drivers. This could however simply be that I was using Windows Home Server and not a standard edition of Windows.
I love the fact I can access 4 more hard drives on my computer--which I did by using a 5.25&#34; bay adapter to hold 4 2.5&#34; hard drives, but I don't like the fact I get the NO AHCI warning at the very beginning and have to wait a few more seconds for it to clear. Haven't figured out how to get rid of the in Windows 7 Pro 64
It's gone up $4 bucks, but I can tell you it works great with NAS4Free if you were looking for a card to stick in your box.I wish I would have gotten 2 of them.It's been 2 yrs and no issues.
works great with OPENMEDIAVAULT. Only thing is that I had to update the card frimware on a windows PC to get it out of RAID mode. Cant remember a option to do it in linux
This card is fully recognized in the motherboard Bios and windows 7 and 8 out of the box. I updated the firmware but it didn't need it. It works great with my SATA Bluray burner and my data storage hard drives. I am not planning on using it with my SATA3 gaming hard drives or the OS boot drives. I am using this to free up the faster ports for faster tasks. All and all I don't even notice a speed difference between this old SATA1 and newer SATA3 anyway.
To use a single card then you would need to connect the card to your hard drive to an extra SATA port and/or a non-RAID based SATA expansion card. Alternatively, we also have USB based enclosures that you may use to easily connect an extra drive to your system. "So according to Sabrent this is a RAID CARD ONLYSomebody screwed up.How do I get my money back?
My old soyo dragon now has extra 4 terabits of HDD spaceNow i have privet data storage on lan thanks to this little thingcheap and gets the job done
I bought two of these (along with an external 5 HDD casing) so I can increase my LVM (logical volume) to include 9 physical hard drives. I popped them in and they worked without a hitch, no need for any drivers, which is always a surprise when I pop in unknown hardware on my Linux Server (Ubuntu 12.04 currently). I have not tested the speed but I am satisfied with how fast I can access my data of the disks on the controller.
Answer: Raid 5 is much more complex computation-wise than RAID 0/1 and requires a more complex on-board processor to handle, thus it's rare to see on cards of this price range and if one at this price point offered it I would be wary of using it.  Raid 5 can be implemented "poorly" and lose parity thus negating it's purpose. I would also recommend looking at other drive array solutions as RAID 5 has fallen out of favor in recent years.  RAID 6, RAID 10 and things like ZFS have a lot more to offer these days. This card is great if you just need to add some disks or replace a faulty on-board SATA controller (why I bought it)