Question about Adaptec 1 Bay ACS-100 (2177400) USB 2.0 External Drive Case

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Red blinking light on my acs-100

I'm having trouble accessing my harddrive i get a red blinking light! how can i resolve this???

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Re: red blinking light on my acs-100

I've actually no idea but instead of troubleshooting it you might want to try to reconnect it by following this guide: [url=http://download.adaptec.com/pdfs/user_guides/acs_100_ug.pdf]ACS 100 User Guide[/url].

Posted on Sep 19, 2005

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Drive not recognized


First make sure usb cable connected to harddrive is working fine. try it in different usb ports. Press windows key +R key so you can see run then type in run "devmgmt.msc" then press ok so you can see device manager uninstall all usb drivers then it automatic install usb drivers. then check. Also you need to change registry for that type in run "regedit" then press ok then you can see registry editor then locate below key. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11 CE-BFC1-08002BE10318} And remove upper filter and lower filter.Then restart computer then check. Try your harddrive in different computer if it is not recognized on another computer too then your harddrive has internal issue. Also locate the below key and make sure it's value is 3 not 4. HKLM\system\currentcontrolset\services\usbstor make sure start value is 3 not 4. Let me know if you need further assistance. Thanks for using FixYa

Dec 05, 2010 | Adaptec 1 Bay ACS-100 (2177400) USB 2.0...

1 Answer

I had a problem with my charging cord on my adaptec 3.5 mobile drive .It reads that it finds it on the computer but dose not read the drive completely, nothing shows the drive is there so I took it to a...


You can physically remove the harddrive inside the case and connect it into another computer as a slave drive. There should be two cables - one for the data and the other for power - connect these two inside the computer next to the master harddrive.

Oct 31, 2010 | Adaptec 1 Bay ACS-100 (2177400) USB 2.0...

2 Answers

I left my power cable at the house when I went on a business trip. I found a computer place that had a cable with the same four pin connections. The tech said the cable would work, but he plugged it in...


Harddrives are built in a 'Clean Room'.
99.9% dust, and foreign object free.

Inside the harddrive are Platters. They resemble a CD disk, and are made of glass, or metal. Their surface is very finely polished.
On the upper, and lower surfaces of these platters, are applied a magnetic media. (Usually Iron Ferrite)

This magnetic media is arranged in a pattern of 0's, and 1's, for the data put on it. The 0's and 1's are then changed into machine language, for the computer to read.

There may be 3 to 6 platters, inside an average harddrive. EACH platter has a Read/Write Head above it, and below it. (Read option of Read/Write head -> 'Reads' data. Write option 'Writes' data. Arranges that magnetic media for the data being applied to it, or taken away. {Address locater removed)

The Read/Write Heads are attached to an 'Arm'. The Arm moves back, and forth across the platter. The arm is actuated by an 'Actuator Motor'. The Actuator Motor is controlled by a circuit board on the bottom of the harddrive.

[More information: http://computer.howstuffworks.com/hard-disk.htm ]

The reasoning of my long 'dissertation', is to help understand my solution/s.

1.It may just be that the circuit board for your harddrive, has burned out components on it. Replacing the circuit board may get your harddrive going again.

How? This may not be a simple task, understandably so. However, when faced with the cost of retrieving data from your harddrive, or finding a compatible circuit board, it may become more relative.

2.Since, removing the platters from the harddrive may be one of the ways the Pro's will use, remember that they have to open the harddrive in a clean room, and use special techniques, as well as special suits that they have to wear. (Lab controlled environment)
Part of the reasoning of the high cost.

3.The motor that drives the platters uses 12 volts. The actuator motor uses a LOT less. If either motor is fried, the platters will have to come out, to read, and copy data off of them, or the motor/s replaced. (Not likely)

Number 1 above, will cost you time to see if a computer shop, has the same type of circuit board you require, and probably around $10 to $20.

Number 2 and 3 above, (Last time I checked), will cost $75 an hour, and on up.

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1 Answer

Drive won't boot


Thry this: turn your computer OFF. Gently unplug and replace the data cable connection to the computer several times. Do the same to the drive end of the cable. Leave one end unplugged. Turn on the computer and when the Mac os is set up and waiting for you, plug the drive in and see if the computer recognizes and reads the drive. The problem is usually corrosion on the contacts that prevent proper contact.

Jun 10, 2009 | BYTECC 1 Bay ME-350U2 USB 2.0 External...

1 Answer

Drive case flashes


The first thing you need to do is figure out if it is the Hard Drive itself or the enclosure.
The best way to do that is remove it from the enclosure & test it either in a PC directly or in another enclosure. If it works, then you can test the enclosure by inserting another Hard Drive & testing it. This should tell you which component is bad.

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