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BYTECC INC > 
Item#: N82E16817145079

BYTECC BT-M251-BK 2 x 2.5" Black USB2.0 & eSATA Drive Enclosure for SATA HDD/SSD, with RAID Switch

  • 2 x 2.5"
  • USB2.0 & eSATA
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Learn more about the BYTECC INC BT-M251-BK

Model

Brand
BYTECC
Model
BT-M251-BK

Spec

Color
Black
Size
2 x 2.5"
AC Adapter
Yes
Internal Interface
SATA I/II
External Interface
USB2.0 & eSATA
Fan
No
Specifications
Storage Policy:
BIG (Concatenation)
JBOD (Just a Bunch of Disks)
FAST (RAID 0)
SAFE (RAID 1)
SAFE33 (1/3 to SAFE mode & 2/3 to BIG mode)
SAFE50 (1/3 to SAFE mode & 1/2 to BIG mode)
GUI (Use the SteelVine Manager GUI to configure the Storage Policy)
Features
Easy open and lock door
Tool-less design for HDD installation, Trayless design - Fast HDD exchanging
Auto negotiation between SATA I (1.5Gbps) & SATA II (3.0 Gbps)
Plug & Play functionality
Supports ATAPI & asynchronous notification
Supports NCQ
Provide SATA Activity LED for each SATA port
DIP Switch or GUI to configure the Storage Policy

Quick Info


Customer Reviews of the BYTECC INC BT-M251-BK

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  • James W.
  • 1/6/2011 5:44:23 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsflaky e-sata

Pros: Cheap. Multi-drive with RAID capability

Cons: e-SATA operations are flaky at best: sometimes will hang the controller, and requires cycling power to recover. This happens on several different computers, so quite sure the BYTECC device is the culprit.

3 out of 3 people found this review helpful. Did you? Yes No

  • Trang N.
  • 1/4/2011 11:08:59 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsCouln't plug it into the podium outlet

Pros: Hardware raid 0/1 in small form factor (except for the power plug - take an egg of for this). Reasonably priced, less would be much better.

Cons: Construction is hard plastic (as stated in another post), brushed to look like metal. The drive (door) insertion levers are flimsy, not for longevity so don't force it. I can hear the drives and the plastic sticks move in the enclose when handling the case. The plastic sticks serve as conduit for the drive/power lights at the back of the unit. The long travel path dims brightness the lights. The power plug is sideway and long (when you plug into the wall socket, the body of the adapter is horizontal), making it difficult to fit properly if your outlet is recessed (i.e. presentation podium). It would be better if they provide a power cable to the adapter.

Other Thoughts: It would be great if this exist as a hard drive RAID 0/1 mobile rack (for mounting in cases), software or hardware (easy access switch) configurable.

1 out of 1 people found this review helpful. Did you? Yes No

  • Jeffrey K.
  • 11/25/2010 4:00:37 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsabove average for price

Pros: + does what it claims for a reasonable price: os/cpu-independant raid you can boot from
+ hardware-raid+jumper-selection means you don't need to install the software to get going...
+ tool-less disk insert/remove
+ appears as standard usb storage under linux; no proprietary software needed for basic usb enclosure function
+ esata port+cable. i haven't had a chance to try the esata yet, but the idea seems like a good alternative to usb 3 (i know more people with esata ports than usb 3 ports)
+ 2 blue hd activity leds and 1 green power led look good in the dark
+ clean black solid-metal body
+ no annoying logos to scratch off

Cons: - POOR DOCUMENTATION of rebuild behavior in event of drive failure. they don't even say if it'll blink at you on problems, or how it decides which drive to overwrite if you happen to remove both drives during an upgrade. it's guessed right SO FAR.
- recovery needs gui software
- no gpl or command-line raid management/status software (having raid implies i want to keep pro-actively monitor the status)
- no S.M.A.R.T. in "SAFE"/raid-1 mode (at least not over usb)
- flimsy+cheaply-molded plastic doors act as eject levers; they feel like they will break, but haven't yet/don't if you go slow
- the warning label makes you think it comes from the factory locked, so you slide the locking sliders and then try to open it and wonder what gives, because you just locked it when it CAME from the factory unlocked.
- does NOT include linux management software ON the cd. you have to look on the Silicon Image's SiI5744 support website
- shipping amounts for 20% of the purchase price
- no usb 3

Other Thoughts: * finishing support touches (better docs, and better gpl scripting/monitoring software support) would make this shine
* could have pin-hole "rebuild FROM disk 0 TO 1" and "rebuild FROM disk 1 TO disk 0" buttons, similar to the mode-select button, which would obviate the need for the gui software entirely
* i'm in it exclusively for the raid-1, so i would have liked it to come configured in that mode.
* it's basically what you would expect for the price... not perfect, but good enough. if one drive dies, you can lurch along until you can find more.

2 out of 2 people found this review helpful. Did you? Yes No

  • Thomas M.
  • 11/2/2010 6:15:06 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

2 out of 5 eggsNot for SSD's

Pros: Nice form factor, nice features

Cons: Very poor performance if you are using ssd's. I tested this against an expternal Antec hd enclosure with the same internal sataII/esata features and saw a 40% throughput loss with this Bytecc unit. The Antec gave me all the advertised throughput of a Vertex 2 60GB SSD whereas this Bytecc unit didn't deliver.
If you are using 2.5" spindle hard drives, then this makes sense ... for SSD's stay away

1 out of 1 people found this review helpful. Did you? Yes No

  • Jeffrey M.
  • 10/8/2010 3:04:14 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsNot too bad.

Pros: Simple. Cheap. Esata. Does work on my mac. makes me feel fruity.

Cons: Esata is not plug & play on my mac. Although the body is solid aluminum the front and rear caps are plastic and flimsy. (especially the doors) Might not be the best travel drive as when you turn it upside down you can hear the hard drives rattle. Definitely not shock proof. Although i really don't know what i was expecting.

Other Thoughts: usb = 30 mb/sec
esata = 100 mb/sec
It should probably be 3 eggs because it ain't that great but i'm trying to be a more positive person. zen.

Did you find this review helpful? Yes No

  • Vernon B.
  • 2/25/2010 5:32:30 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsVery good enclosure

Pros: Nice for removing the drives, no screws required. Works well in both raid and JBOD. Instantly recognized in Windows 7. The included software works well to manage the raid options, data backup, etc. Doesn't come with a usb power only cable, but one from another drive does work just fine.

Cons: None

Well ,maybe the manual but I just gave the best tips in the other thoughts.

Other Thoughts: A couple of tips not in the manual. To first set this up (choose the raid or other config) plug it in USB rather than E sata. I found that if I plugged in Esata first, it would recognize only 1 drive in the manager utility. Plugging in USB showed both drives and allowed me to configure raid. Also, I'm impressed that I can use a usb to 5volt cable from a dane-elec drive to power this without the wallwart. This even worked from my laptop with 2 seagate 72k 320gb drives in raid powered only with 1 usb port. Also, be sure to go to manage my computer, disk management to create or modify the volume. You can't format it if there isn't a partition. Windows gives you the tools you need.

2 out of 2 people found this review helpful. Did you? Yes No

  • edward N.
  • 2/12/2010 9:19:29 AM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsExcellent Value

Pros: +Metal Case helps with disbursing the heat
+power adapter work with 120V +240V so its good if you travel to different countries
+cheapest thing out there
+runs a Silicon Image’s SteelVine Chip for raid control

Cons: +I wish it had vents for extra cooling,

Other Thoughts: I wanted a Raid solution that was small and affordable, not many options. i am running two 320GB WD Scorpions works great.

2 out of 2 people found this review helpful. Did you? Yes No

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BYTECC INC > 
Item#: N82E16817145079
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