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Item#: N82E16816151111

areca ARC-6120-T121 Battery Backup

  • ARC-6120-T121
  • Battery Backup Unit For Areca ARC-1882 Series Up to 72 Hrs of Cache Backup
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Learn more about the Areca ARC-6120-T121

Model

Brand
areca
Model
ARC-6120-T121

Type

Type
Battery Backup

Spec

Specifications
Battery Backup Unit For Areca ARC-1882 Series Up to 72 Hrs of Cache Backup

Quick Info

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years


Customer Reviews of the Areca ARC-6120-T121

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  • Michael G.
  • 8/9/2014 12:14:47 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsIt's a battery.

Pros: It hasn't failed yet, so that's pretty awesome. It's hard to write pro's on a battery!

Cons: It was actually a performance loss for me until I tweaked some configs...

Other Thoughts: Adding this BBU to your raid card will do a few things. It allows you to utilize the on-board ram to it's fullest without the risk of losing the data if your power goes out. The thing is though... If you do add this, it will disable writing to the cache in your hard drives, which for me was a MAJOR performance loss. It took months of emails to areca to figure out why my old raid card with significantly less ram was outperforming my new one. The areca card disables the cache in the hard drives because it can't supply power to them in the event of a power loss (thus, you'd lose some data). You can override this "feature" in the system config section of the website hosted by your raid card by switching "Disk Write Cache Mode" to Enabled from auto. In the event of a power loss, there is now a chance of losing some of your data though, so you should only do this if you have a UPS attached to your computer.

Another thing is that this BBU is made for areca raid cards with DDR3 RAM. It is not compatible with the older cards. If your raid card wants a "ARC-6120BA-T121", THIS IS NOT THE RIGHT PRODUCT!

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  • Ovidiu P.
  • 5/17/2014 10:45:39 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsPerformance difference with the BBU installed

Pros: Once you install the BBU in your system, you can safely enable the Write Back cache mode, which lets the RAID controller cache the writes in its internal cache before writing the data to disk.

Somebody asked what is the difference in performance between the Write Trough and Write Back. I ran fio on Ubuntu 14.04 server with a RAID10 system made of 4 x 4TB Seagate ST4000NM0023 SAS drives, running on Areca 1882i.

When you enable Write Back write cache mode, you gain 11.8% in bandwidth, and 28% in IOPS.

Cons: A somewhat high cost for what you get.

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  • LISBET B.
  • 3/11/2014 5:55:37 PM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsThought it was faulty...

Pros: It performs as stated, but there's a caveat. It wouldn't work as expected when I first installed it.

Cons: Granted, this isn't just a battery, but even then, I can't fathom how this battery backup module can cost so much money. Nevertheless, if you don't want it, then don't buy it.

On another note, I was very close to sending this back to Newegg because it was not working properly. When I used ArcHTTP to view temps/ voltages, the temp was either insanely high (160 deg C) or insanely low (2 deg C). Only one voltage was being recorded, while all other voltages were 0 v. Something was obviously wrong. I took it out, boxed it up, but then I decided to read the manual again (the BBM section). In the manual, it says that whenever you replaced the battery itself, you're supposed to plug the battery connector into a J2 socket on the BBM circuit board. I looked on mine, and I noticed there's actually two connector sockets right next to one another. A J2 and a J4. But, the battery was plugged into socket J4! I re-connected the battery connector into socket J2, re-installed BBM, booted server, and examined ArcHTTP again. Everything was normal! Long story short, ensure that the battery cable is installed on socket J2 on the circuit board, not socket J4.

Other Thoughts: I will definitely not pay the same amount of money when the time comes to replace the dead battery. There are work-arounds, and I'll be going that route instead.

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  • Robert S.
  • 1/15/2014 2:37:02 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsCompatibility Info

Pros: Allows write cache to work!

Cons: Compatibility information needs to be updated. It is expensive.

Other Thoughts: This will work with the ARC-1214 as well as the ARC-1882. Areca really needs a compatibility matrix for their battery modules as the previous "works with ARC-12xx" for the ARC-6120-3 doesn't apply.

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Item#: N82E16816151111
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