Quoting banibrata dutta <[EMAIL PROTECTED]>: > i recently purchased a USB external HDD enclosure for 2.5" (laptop) hdd's. > it's make/model are :- > http://www.v-link.com.cn/index.html (chinese site, readable thru Babelfish > at Altavista) > Model: VE-007NHD > the problem is, this is not being auto-detected by Windows98SE, WinXP and > on RedHat Linux 7.2 (PCMCIA kernel) either ??? when i see > /proc/bus/usb/devices there it doesn't show up as anything... of course > this enclosure came as a small plastic box with 2 inputs. 1 for USB and the > other for DC input. the manual (leaflet) said that DC power is not > essential and supplied no specs on it's power requirements
I would *very much* doubt that the HDD can be fed with USB power. Most HDDs are really power-hungry, and they want dual (+5V, +12V) power supplies. For example, a (not a notebook) IBM HDD that I have on the desk says that it wants +5V, 0.3A and +12V, 0.5A = this makes 8W of power, way beyond what the full-power USB (+5V, 0.5A) can provide. Granted, notebook drives can be smaller and need less power, but still I'd call it a viable reason of your troubles. Here is the same comment from v-link people (don't laugh!): > In 8. present markets USB transfers the string mouth product in meets > when certain strings mouths equipment is unable to use ? > In removes USB transfers string mouth line itself the quality and under > the installment question premise, possibly is because this string mouth > equipment needs the 12v voltage only then can normally work, but uses > USB transfers the string mouth line cannot provide the full amount 12v > voltage, causes this string mouth equipment to be unable normally to > work. V-LINK series USB transfers the string mouth line is in conducts > the research, in the test foundation to each kind of string mouth > equipment designs the production, through has increased IC enlarges the > electric circuit above the way will because USB conveys the string mouth > line institute generally proposes for approximately 8.5v rises to stable > 12v, cannot appear because USB above transfers the situation which the > string mouth line power supply insufficient appears is unable to use. Couldn't say better myself :-) > either. it has 2 LED's red and green, none of them glow ever, and i am > unable to find out if it works at all. If the LEDs are not activated it does not mean yet that the device is not alive. They can be software-controlled (by the driver, which you don't seem to have.) > my older laptop simply reboots bigtime the moment i plug in this device > while it is running. the newer laptop doesn't do so, but this too > doesn't detect the device. If you don't see "Device connect ..." in the log on Linux then the device is not alive. Upon plugging in the power is applied, and the device is supposed to signal the HC about its readiness to be enumerated. If you do not get that far then the device isn't doing what it should do. It could be pre-USB 1.0, possibly? (and broken today, as such...) With regard to storage class compatibility, here is another FAQ entry, as far as I could understand: > 8. Whether the USB portable hard disk may take the system driver use? > > Up to now cannot support takes the main driver. Your guess is as good as mine... at least the fish made it readable. Thanks, Dmitri -- Linux is addictive, I'm hooked! (MaDsen Wikholm's .sig)
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