Ubuntu :: Live CD Freezes @ "[sdb] Attached Scsi Removable Disk"

May 29, 2010

Trying to boot Ubuntu live CD 10.04 and getting some problems. I will get to the section where I have to pick a language and then choose the option to run from the CD. It will start to load and then it will hang up at "[sdb] attached scsi removable disk". I unplugged all of my external HD's. I burned the 32 bit version because it was recommended on the site.

Asus
Pentium Dual core CPU E5400 @ 2.70 GHz
5 Gigs of RAM
Current clock speed 2700MHz
Running Windows 7

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Ubuntu :: Boot Freezes At SCSI Attached Devices?

Jul 22, 2011

i was fooling around with ATI graphics settings and after i went to reboot my Desktop it kept comming up with odd symbols instead of a log in screen, then i started to try and do things with a LiveCD and screwed things up even more so now any time i attempt to boot, even into recovery, it stops at the line

[2.573600] sd 6:0:0:3: [sde] Attached SCSI removable disk

i have tried to do multiple fixes with no avail and i am not very savvy with linux as i have only been using it under a year, so it would be awesome if anyone could help this is 10.10 Maverick and the 32bit version,

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I have a large RAID array of 12 TB attached to one of my Ubuntu server machines. The RAID volume is formatted with NTFS. The problem is that I can not mount this volume in Ubuntu. I can read it normally if I attach it to windows machine.This is the output from "sudo fdisk -l":

sudo fdisk -l
Disk /dev/sda: 164.7 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders[code]........

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Jun 30, 2010

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Jul 30, 2010

When you run a Linux live CD it automatically detects your hardware configuration, or at least tries to. Say you got a live CD and it works perfect on one computer, detects all the hardware. If you install the operating system from the live CD to a hard drive, does it only install the drivers you need for your hardware?

If so, say you were to hypothetically do that on a removable hard drive that you lock and unlock with the hardware keys; would that mean if you want to move the drive from one computer to another regularly, the OS would not be configured properly on a different hardware configuration, and wouldn't be able to configure itself properly because it is now on a hard drive? I know that Linux does try to detect new hardware each time it boots, but I guess the short version of the question is: Does installing a distribution on a live CD to a hard drive mean you will not have all the drivers available on the CD?

This is not something I am sure I will ever plan to do, but it would be no different than if you wanted to swap your drive into a new computer. If it could at least still connect to the Internet it might try to reconfigure itself. If installing the live CD means you get absolutely all the contents on the CD, that would answer my question. Maybe someone might know exactly how that would work.

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Jul 4, 2010

I've got a removeable disk which I want to mount on startup automatically at mountpoint "/backupsystem". If' it's not there I would like to have no error message. Actually after upgrading to 10.4 I get the message: Continue to wait; or press S to skip mounting or M for manual recovery.". But I don't wand this if the disk is not there that's OK for me. How would I configure fstab to achieve this?

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May 6, 2009

I see to be having a problem with the SCSI disk that I'm trying to install. The computer that it is attached to was Win XP and SCSI worked fine. When we changed the computer over to Fedora 10, SCSI was being read by the computer but is not accessible.

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Apr 16, 2010

The system is fc12 with a scsi pci card. There are 4 disks on the scsi chain, properly terminated. At boot time the system does not recognize the 4th drive. It creates a /dev/sdh entry, but the individual partition entries are not created. fdisk /w creates the /dev/sdh* partition entries. After that the drive is recognized by the system.

Is there record of the device scan activity? What could cause the boot process to identify the drive but stop short of identifying the partitions.

dmesg output seem normal
scsi3 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 7.0
<Adaptec (Compaq OEM) 29160 Ultra160 SCSI adapter>
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
scsi: waiting for bus probes to complete ...

[Code].....

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Nov 20, 2010

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I am using CentOS 5, and have tried mounting the disk as msdos and as vfat and get superblock errors among others.

what filesystem type did OS-2 use? is there an add on to CentOS that will support the filesystem?

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I have a storedge 3511 array attached to a centos 4 system and need to upgrade to redhat 5. 1) How can I find out how the array was attached to the system? and/or 2) What do I need to do during the install for the array to be recognized?

fdisk -l output:
WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sde: 4998.3 GB, 4998352076800 bytes
255 heads, 63 sectors/track, 607681 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 1 267350 2147483647+ ee EFI GPT

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Mar 26, 2010

I am developing for a Linux based device for which the HOT PLUG option is deactivated. As part of optimizing the code, we also don't want to create device files for unused devices. We understand that both USB attached and fixec SCSI hard disks would create device files like /dev/sda,/dev/sda1 /dev/sdb, /dev/sdb1 etc. Is this understanding correct?

In the case of USB attached SCSI devices, would driver create this device file entry? How is it created? Can somebody please tell me how it is being created automatically. In case I attach a fixed SCSI hard disk before boot up(and create device file /dev/sda1), would USB SCSI device driver create device files starting from /dev/sdb, automatically.

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Jul 5, 2010

I have three disk in my system. One SATA (250GB) and two SCSI (73GB) disks. The Two SCSI disks were installed originally and RHEL3 is installed on it. The SATA disk is installed a few years later with RHEL5. As you can see below, the boot sector is still on one of the SCSI disks (sdb1).

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda1 236545184 15259760 209075624 7% /
/dev/sdc2 68539636 4578792 60479160 8% /users
/dev/sdb1 101089 26847 69023 29% /boot
/dev/sdb3 68437272 36963704 27997104 57% /RHEL3U7
tmpfs 2025916 652 2025264 1% /dev/shm

How I can move the boot sector from the SCSI disk (sdb) to the SATA disk (sda) without losing data and without re-installation?

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Jul 6, 2010

So I have a system that is about 6 years old running Redhat 7.2 that is supporting a very old app that cannot be replaced at the moment. The jbod has 7 Raid1 arrays in it, 6 of which are for database storage and another for the OS storage. We've recently run into some bad slowdowns and drive failures causing nearly a week in downtime. Apparently none of the people involved, including the so-called hardware experts could really shed any light on the matter. Out of curiosity I ran iostat one day for a while and saw numbers similar to below:

[Code]...

Some of these kinda weird me out, especially the disk utilization and the corresponding low data transfer. I'm not a disk IO expert so if there are any gurus out there willing to help explain what it is I'm seeing here. As a side note, the system is back up and running it just runs sluggish and neither the database folks nor the hardware guys can make heads or tails of it. Ive sent them the same graphs from iostat but so far no response.

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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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Jun 8, 2015

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I got the Debian+Mate ISO file from the Debian website, and created a bootable USB stick. (Note : I have done this several times, getting new ISOs, and using Unetbootin, Universal USB Installer, and Linux Live installer; the result is always the same.)

When I boot the USB drive, all appears good at first. I get to the Debian (or Mate?) screen which is a pale jade green with a white squiggle in the middle region, with a panel at the top; this shows at left three options - applications, places, and system; and at right the correct time, a sound symbol,the wifi symbol, and a battery indicator. At the left of the screen in vertical arrangement there are 4 icons labelled computer, users home, install Debian Sid, and trash. On the bottom panel, at left there is a "button" for "click to hide all windows & show desktop", and at right 4 squares for workspaces.

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The cursor moves ok. The only actions that it creates are the information drop-down texts that tell me what the headings mean - e.g. no connections when I hover the cursor above the wifi connections symbol.

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