Ubuntu :: USB Pen Drive Unreadable - Show Up Like SCSI

May 29, 2010

I try to use a usb pen drive. The usb pen drive show up under computer but not like a drive in geparted. When I look in the log file I find the drive
Code:
May 29 10:11:46 CQ60 kernel: [ 112.942602] scsi 6:0:0:0: Direct-Access
USBest USB2FlashStorage 0.00 PQ: 0 ANSI: 2
I do not know what this mean but it looks like the drive show up like a scsi and not usb or? I need a clue to get it work like a normal usb device.

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When I inset my External Hard drive into my laptop it shows 27.3 gb occupied but doesn't show all the files. Also , this is happening only now.

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May 8, 2010

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I can see the drive using Disk Utility. It is located at /dev/sbd. (a) mount this drive or (b) recover its data so I can format it? I'd much prefer (a), of course. Regarding my level of tech savvy: I've been using Ubuntu for a couple years, but I chose Ubuntu because it allows me to use Linux while still remaining relatively ignorant about things, which is my comfort zone.

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Jul 19, 2010

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Reallocated sector count
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Worst: 61
value: 6488

Current pending sector count:

Normalized:1
threshold: 0
worst: 1
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Server :: Error SCSI Controller Was Reset Due To SCSI BUS Noise Or An Invalid Signal?

Feb 15, 2010

i m facing same error in most of the HCL servers. the problem is that it throws error while booting and sometimes not throws error. the error is :-

Feb 13 13:17:25 fe13s kernel: Adapter 0: Bus A: The SCSI controller was reset due to SCSI BUS noise or an invalid signal. Check cables, termination, termpower, LVDS operation, etc.

Feb 13 13:17:30 fe13s kernel: Adapter 0: Bus B: The SCSI controller successfully recovered from a SCSI BUS issue. The issue may still be present on the BUS. Check cables, termination, termpower, LVDS operation, etc

Feb 13 13:29:15 fe13s kernel: Adapter 0: Bus B: The SCSI controller successfully recovered from a SCSI BUS issue. The issue may still be present on the BUS. Check cables, termination, termpower, LVDS operation, etc
code....

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Apr 11, 2011

In my understanding, the way /proc/scsi/scsi gets populated, /proc/paritions also gets populated in the same fashion. i.e. the description for first entry of /proc/scsi/scsi can be seen in the first entry of /proc/partitions and same for rest.

So, With this assumption, in my project, I used to relate first entry of /proc/scsi/scsi with first entry of /proc/partitions to get its total size and same for all entries.

But, I observed some differences in following scenario, where

1) The first 4 entries in /proc/scsi/scsi are SAN luns attached to my system and for which the actual device names in /dev/ are sda,sdb,sdc and sdd.

2) The last 4 entries are the internal HDDs on same system. In /dev/, their respective device names are sde,sdf,sdg & sdh.

(Output attached at end of the thread)

But in /proc/partitions, the device order is different.

You can see their respective sizes in /proc/partition output as well.

So, my question is, in this particular scenario, I can't relate the first entry of /proc/scsi/scsi with first entry of /proc/partition. i.e. scsi0:00:00:00 is not /dev/sde, because it is actually /dev/sda.

It seems that my assumption is wrong in this scenario.

Is there any way or mechanism to figure out actual device name for an entry in /proc/scsi/scsi in /dev/ directory?

How can my application should relate /proc/scsi/scsi entries with their respective device names and sizes?

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Disk /dev/cciss/c0d0: 72.8 GB, 72833679360 bytes
255 heads, 63 sectors/track, 8854 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 * 1 13 104391 83 Linux
/dev/cciss/c0d0p2 14 8854 71015332+ 8e Linux LVM

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Jan 22, 2010

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[code]....

Is removing a disk from the bus a reasonable test in the first place? Meaning, is this likely to happen in a production environment by other means than a human coming by and yanking out the drive? Meaning, is there a hardware failure that would replicate this event? Because, if so, then I don't know how to recover from it.

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[Code]....

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Code:

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May 15, 2010

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[Code]....

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