Software Raid for clones

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Professionaly, I deal with Proliant systems with Smartarrays ... which is to say I deal very little with the hardware interface-level stuff, it just always works. Personally I inherited this E6750 (Core 2 Duo) ASUS motherboard and wanted thought I'd build a nice server for general use. I added 4 SATA 250 Gb disc drives and after reading about the horrors & failures of the cheapie Raid controllers, I decided to try Linux software raid.

I made Raid volumes for each drive pretty much the same size as I would an ordinary drive, but all four drives. I then specified raid devices (md0 was /boot using Raid1 between drive 0 &1) md2 was /, likewise mirrored between 0&1 while md3, 4 & 5 were RAID5 across all 4 drives. (so drives 2 &3 each had two wasted partitions and each drive also had a regular old swap partition)

Anaconda installed Linux (RHEL4-U5-i386) and during final boot, I got a message that Raid Superblocks weren't correctly written, but it came up & ran fine. I gave it some file copying work to do while I was busy ... and I came back 2 hours later to find Linux reporting that /home was now a read-only file system (as was /usr & /var) and the system was, as they say, dead as fried chicken.

Upon reboot, I got a message from every MD partition that there were not enough available partitions for /usr /var & /home and that they each had 2 of 4 devices failed.

Repeated the steps above ... not correcting a single step ... got the same results ->> that didn't surprise me, so I'm at least partially insane.

So far, web searching has yielded (1) Asus motherboards are bad (2) Sata-nv drivers buggy (3) Sata disc drives evil (4) Forget about Raid on /boot or / (5) Linux doesn't support sata or Raid very well until RHEL5 and the ubiquitous #6 .... with me on almost any project .... that I suck as a technician, in way over my head, have so many knowledge gaps that I skipped so many crucial steps that the only wonder is that the hardware did not turn on me and try to electrocute me.

So now the questions:
(A) Anyone see an obvious, incorrectable flaw in the technology such as a 'known condition' given the situation? (trust me .. #6 is a universal constant) (B) Anyone suggest the step(s) that I missed that even a trained monkey would have noticed (be honest, I can take it) (C) If I just invested the $$ in an LSI logic or MSI (real hardware raid) controller, would all these problems just vanish?






At 09:00 AM 2/11/2008, you wrote:
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Today's Topics:

   1. Re:Why am I seeing this?  ** portmap server not responding
      **? (Pankaj Batra)
   2. how to make mirror of server on red hat 8.0 (Pankaj Batra)
   3. Re: how to make mirror of server on red hat 8.0 (Romeo Theriault)
   4. RE: Disk partitions and LVM limits (Tom Greaser)
   5. RE: SSH Consent Banner (Mertens, Bram)
   6. Keyboard layout problem in XEN virtual machine (Mertens, Bram)
   7. "smbclient -L servername -N" not working (Margaret Doll)
   8. RE: Disk partitions and LVM limits (Kirk Wight)


----------------------------------------------------------------------

Message: 1
Date: Sun, 10 Feb 2008 18:24:06 +0000 (GMT)
From: Pankaj Batra <batra786@xxxxxxxxxxx>
Subject: Re:Why am I seeing this?  ** portmap server not responding
        **?
To: redhat-list@xxxxxxxxxx
Message-ID: <386145.84784.qm@xxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=iso-8859-1

Hi Ryan.

## Try stopping portmap and xinetd service and then unexporting the export files for that particular IP and then restart your server and then start the service ie portmap and xinetd.Check logs then.

## Please check the following file also /etc/fstab on both server and client.


  Best of Luck.


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Today's Topics:

1. Disk partitions and LVM limits (Peter Blajev)
2. Why am I seeing this? ** portmap server not responding **?
(Ryan Golhar)
3. RE: Disk partitions and LVM limits (Geofrey Rainey)


----------------------------------------------------------------------

Message: 1
Date: Fri, 8 Feb 2008 10:58:56 -0800
From: Peter Blajev

Subject: Disk partitions and LVM limits
To: Red Hat List
Message-ID: <200802081058.56499.pblajev@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"

Hi,

I've got a DAS DELL MD1000 with a bunch of SATA drives in RAID 5 configuration
with total space of 5.4TB. This box is attached to a CentOS5 system (kernel
2.6.18-53.1.6.el5).

Any idea how to make this space usable?
Is there a limit how big a partition can be? What is the work around?
Is there a limit how big a file system ca be?

I've tried to partition it but no matter how bug partition I create fdisk
spits out these messages on the console:
---
sdb: very big device. try to use READ CAPACITY(16).
SCSI device sdb: 10248519680 512-byte hdwr sectors (5247242 MB)
sdb: Write Protect is off
---

I decided to not partition the drive and use LVM but the physical volume
stopped at 2TB.

So, right now I can't use LVM because of this 2TB limit and I'm not sure if I
partition the drive how good these partitions are because of the the message
from fdisk.

Any help or idea is highly appreciated.

Thank you
Peter



------------------------------

Message: 2
Date: Fri, 08 Feb 2008 15:06:08 -0500
From: Ryan Golhar
Subject: Why am I seeing this? ** portmap server not responding **?
To: General Red Hat Linux discussion list
Message-ID: <47ACB630.2050905@xxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I have a server (RHEL 5) that makes 2 directories available to a bunch
of clients via NFS. I keep seeing this particular message in the
servers log:

Feb 8 15:02:12 sapphire kernel: portmap: server 192.168.101.164 not
responding, timed out

The machine, 192.168.101.164 is a client machine that isn't even up at
the moment. I remove the entry from /etc/exports for that machine and
re-ran "exportfs -rv". I still see this message.

The server isn't mounting any file system or anything from the client
machine. Why would I see this message on the servers logs?

Ryan




------------------------------

Message: 3
Date: Sat, 9 Feb 2008 23:42:46 +1300
From: "Geofrey Rainey"
Subject: RE: Disk partitions and LVM limits
To: "General Red Hat Linux discussion list"
Message-ID:

Content-Type: text/plain; charset="us-ascii"

You could change the sizing of the 5.4TB logical partition into smaller
logical partitions
Of 2TB in size, make each of these a physical volume and add them to a
volume group, then create a logical volume from that volume group.
I don't know if this 2TB limit will affect this procedure though.

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Peter Blajev
Sent: Saturday, 9 February 2008 7:59 a.m.
To: Red Hat List
Subject: Disk partitions and LVM limits

Hi,

I've got a DAS DELL MD1000 with a bunch of SATA drives in RAID 5
configuration with total space of 5.4TB. This box is attached to a
CentOS5 system (kernel 2.6.18-53.1.6.el5).

Any idea how to make this space usable?
Is there a limit how big a partition can be? What is the work around?
Is there a limit how big a file system ca be?

I've tried to partition it but no matter how bug partition I create
fdisk spits out these messages on the console:
---
sdb: very big device. try to use READ CAPACITY(16).
SCSI device sdb: 10248519680 512-byte hdwr sectors (5247242 MB)
sdb: Write Protect is off
---

I decided to not partition the drive and use LVM but the physical volume
stopped at 2TB.

So, right now I can't use LVM because of this 2TB limit and I'm not sure
if I partition the drive how good these partitions are because of the
the message from fdisk.

Any help or idea is highly appreciated.

Thank you
Peter

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Pankaj Batra
( TL ) iBilt Technologies Ltd.

---------------------------------
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------------------------------

Message: 2
Date: Sun, 10 Feb 2008 19:01:14 +0000 (GMT)
From: Pankaj Batra <batra786@xxxxxxxxxxx>
Subject: how to make mirror of server on red hat 8.0
To: redhat-list@xxxxxxxxxx
Message-ID: <842539.17699.qm@xxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=iso-8859-1

Hi techies..
Please can anyone guide me how to make mirror of server on red hat 8.0. I have IBM eseries server with RAID 5 configured with 4 SCSI drives.
  I wanna make to make mirror of it on similar server.
So that at time of any kinde of crash I can use the mirror and data and time can be saved.


  Regards & Thanks.





Pankaj Batra
( TL ) iBilt Technologies Ltd.

---------------------------------
Forgot the famous last words? Access your message archive online. Click here.

------------------------------

Message: 3
Date: Sun, 10 Feb 2008 16:28:35 -0500
From: "Romeo Theriault" <romeotheriault@xxxxxxxxx>
Subject: Re: how to make mirror of server on red hat 8.0
To: "General Red Hat Linux discussion list" <redhat-list@xxxxxxxxxx>
Message-ID:
        <46cd475b0802101328p2618e2d2n4fdbd1b6789dbe0e@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1

These two have worked well for me in the past.

clonezilla live - http://clonezilla.sourceforge.net/clonezilla-live/
g4u - http://www.feyrer.de/g4u/

Romeo

On Feb 10, 2008 2:01 PM, Pankaj Batra <batra786@xxxxxxxxxxx> wrote:

> Hi techies..
>                   Please can anyone guide me how to make mirror of server
> on red hat 8.0. I have IBM eseries server with RAID 5 configured with 4
> SCSI drives.
>  I wanna make to make mirror of it on similar server.
>  So that at time of any kinde of crash I can use the mirror and data and
> time can be saved.
>
>
>  Regards & Thanks.
>
>
>
>
>
> Pankaj Batra
> ( TL ) iBilt Technologies Ltd.
>
> ---------------------------------
>  Forgot the famous last words? Access your message archive online. Click
> here.
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>



--
Romeo Theriault
System Administrator
Information Technology Services
Ph#: 207-561-3517
Em@: romeo.theriault@xxxxxxxxx


------------------------------

Message: 4
Date: Sun, 10 Feb 2008 17:05:49 -0500
From: "Tom Greaser" <tgreaser@xxxxxxxxxxx>
Subject: RE: Disk partitions and LVM limits
To: <redhat-list@xxxxxxxxxx>
Message-ID: <47AF2EED.34C4.0040.3@xxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8

If you man fdisk
fdisk  doesnâ??t  understand  GUID  Partition  Table  (GPT) and it is not
       designed for large partitions. In particular case use more
advanced GNU
       parted(8).

try parted and let use know if that works.. im coming up on a large BOD
setup soon


Message: 3
Date: Sat, 9 Feb 2008 23:42:46 +1300
From: "Geofrey Rainey" <Geofrey.Rainey@xxxxxxxxxx>
Subject: RE: Disk partitions and LVM limits
To: "General Red Hat Linux discussion list" <redhat-list@xxxxxxxxxx>
Message-ID:
<FCFF2EC7A020964FBC98B17F17A88AC453D246@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"

You could change the sizing of the 5.4TB logical partition into smaller
logical partitions
Of 2TB in size, make each of these a physical volume and add them to a
volume group, then create a logical volume from that volume group.
I don't know if this 2TB limit will affect this procedure though.

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Peter Blajev
Sent: Saturday, 9 February 2008 7:59 a.m.
To: Red Hat List
Subject: Disk partitions and LVM limits

Hi,

I've got a DAS DELL MD1000 with a bunch of SATA drives in RAID 5
configuration with total space of 5.4TB. This box is attached to a
CentOS5 system (kernel 2.6.18-53.1.6.el5).

Any idea how to make this space usable?
Is there a limit how big a partition can be? What is the work around?
Is there a limit how big a file system ca be?

I've tried to partition it but no matter how bug partition I create
fdisk spits out these messages on the console:
---
sdb: very big device. try to use READ CAPACITY(16).
SCSI device sdb: 10248519680 512-byte hdwr sectors (5247242 MB)
sdb: Write Protect is off
---

I decided to not partition the drive and use LVM but the physical volume
stopped at 2TB.

So, right now I can't use LVM because of this 2TB limit and I'm not sure
if I partition the drive how good these partitions are because of the
the message from fdisk.

Any help or idea is highly appreciated.

Thank you
Peter

--
redhat-list mailing list
unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
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==========================================================
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------------------------------

Message: 5
Date: Mon, 11 Feb 2008 11:07:12 +0100
From: "Mertens, Bram" <mertensb@xxxxxxxxxxxx>
Subject: RE: SSH Consent Banner
To: "General Red Hat Linux discussion list" <redhat-list@xxxxxxxxxx>
Message-ID:
        <E4763D73EF6E4848853562C30CA5A9AF012791BE@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain;       charset="us-ascii"

Doesn't pressing CTRL+C get you out of this?  In that it stops
processing the script but still lets you log in.

Regards

Bram

>


Mazda Motor Logistics Europe NV, Blaasveldstraat 162, B-2830 Willebroek
VAT BE 406.024.281, RPR Mechelen, ING 310-0092504-52, IBAN : BE64 3100 0925 0452, SWIFT : BBRUBEBB

-----Original Message-----
> From: redhat-list-bounces@xxxxxxxxxx
> [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Paul Whitney
> Sent: zaterdag 2 februari 2008 2:07
> To: General Red Hat Linux discussion list
> Subject: Re: SSH Consent Banner
>
> Actually, this worked for me. I created a separate script
> that is called
> within /etc/bashrc. This is what happens. It is probably
> considered crude,
> but it works for me. Please let me know if there is a flaw in
> this approach.
>
> Thanks.
>
> Paul
>
> HOSTNAME=`hostname`
>    GREET=`cat /etc/issue`
>    echo $GREET
>    echo "Do you agree to this consent? [Y/N]"
>    read answer
>
>    case $answer in
>
>    Y|y)
>      echo "Welcome to $HOSTNAME."
>      ;;
>
>    N|n)
>      echo "Goodbye."
>      sleep 2
>      PID=`ps -ef | grep ssh_test_1 | awk ' {print $3} '`
>      kill -9 $PID
>      ;;
>
>    *)
>      echo "Goodbye.  Try SSH again"
>      echo "You Must enter a Y or a N "
>      sleep 2
>      PID=`ps -ef | grep ssh_test_1 | awk ' {print $3} '`
>      kill -9 $PID
>      ;;
>
>    esac
>
>
>
> On 2/1/08 7:21 PM, "Nikolas Lam"
> <nlam87346@xxxxxxxxxxxxxxxxxxx> wrote:
>
> >
> >
> > On Fri, 2008-02-01 at 11:08 -0500, Paul Whitney wrote:
> >> Can someone tell me how to configure SSHD to present a
> yes/no prompt? My
> >> system currently is configured to present a consent
> banner, but it does not
> >> require users to agree to the consent. Any help is appreciated.
> >>
> >> Paul W.
> >>
> >>
> >
> > Not sure how to do exactly that, but you could just present
> something
> > using
> >
> >  Banner /etc/ssh_issue
> >
> > in /etc/ssh/sshd_config. This will print the contents of
> /etc/ssh_issue
> > just before putting in their passwords. In it you could
> say, entering
> > your password is agreeing to your terms and conditions.
> >
> > Once they log in, they'll also by default get the system's /etc/motd
> >
> >
> > N.
> >
> >
>
>
> --
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>



------------------------------

Message: 6
Date: Mon, 11 Feb 2008 11:27:30 +0100
From: "Mertens, Bram" <mertensb@xxxxxxxxxxxx>
Subject: Keyboard layout problem in XEN virtual machine
To: "General Red Hat Linux discussion list" <redhat-list@xxxxxxxxxx>
Message-ID:
        <E4763D73EF6E4848853562C30CA5A9AF012791D0@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain;       charset="us-ascii"

Hi

My office uses a number of Windows-only tools which is forcing me to
reboot into Windows several times a say.  To avoid this I'd like to set
up a virtual machine (using XEN) so I can run those tools in it.

After strugling to get Windows XP to install (halfway during the
installation it forces a restart and after this it wouldn't find the CD)
I discovered that even though all the keyboard and language settings are
in XP the keyboard layout is still wrong.  We use azerty keyboards and I
have configured the virtual machine as such but *after the installation*
the keyboard is interpreted as querty.  I stress *after the
installation* because somewhere during the installation you can change
the keyboard layout - which I did - and after that the keyboard layout
was interpreted correctly by the installation program.

How can I configure the virtual machine to recognize my keyboard as
azerty (be-latin1)?

Regards

Bram



Mazda Motor Logistics Europe NV, Blaasveldstraat 162, B-2830 Willebroek
VAT BE 406.024.281, RPR Mechelen, ING 310-0092504-52, IBAN : BE64 3100 0925 0452, SWIFT : BBRUBEBB




------------------------------

Message: 7
Date: Mon, 11 Feb 2008 09:27:01 -0500
From: Margaret Doll <Margaret_Doll@xxxxxxxxx>
Subject: "smbclient -L servername -N" not working
To: samba <samba@xxxxxxxxxxxxxxx>,      General Red Hat Linux discussion
        list <redhat-list@xxxxxxxxxx>
Message-ID: <BE07593D-7D9C-4244-A96C-869ACC752E20@xxxxxxxxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

I would appreciate any ideas on how to correct the problem that we are
having that is outlined below.  Thanks for your help.

I have been running samba for a long time.  Currently we are having
problems with it filling up /var/log/messages with

Feb  7 10:45:02 servername smbd[2157]:   Can't become connected user!
Feb  7 10:45:02 servername smbd[2158]: [2008/02/07 10:45:02, 0] smbd/
service.c:make_connec
tion_snum(928)

In doing the list of checks on samba and nmbd, I find that only

smbclient -L servername -N
Anonymous login successful
Domain=[DEPT] OS=[Unix] Server=[Samba 3.0.25b-1.el4_6.4]
tree connect failed: NT_STATUS_LOGON_FAILURE

doesn't work.

smbclient -L servername -U username

works fine.


rpm -aq | grep samba
samba-common-3.0.25b-1.el4_6.4
samba-client-3.0.25b-1.el4_6.4
system-config-samba-1.2.21-1.el4.1
samba-3.0.25b-1.el4_6.4
samba-swat-3.0.25b-1.el4_6.4

uname -r
2.6.9-67.0.1.ELsmp

Our guest account, chemug in samba, cannot log into the system.
Regular accounts on samba are having no
problems connecting to and printing through our server.


more smb.conf
# Global parameters

[global]
        workgroup = DEPT

        netbios name = servername
        server string = servername - DEPT Samba Server
        interfaces = 128.148.nn.nn/24 127.0.0.1

        security = user
        smb passwd file = /etc/samba/smbpasswd

        log file = /var/log/samba/log.%m
        max log size = 50
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        dns proxy = yes
        os level = 255
        preferred master = yes

        domain master = yes
#       Added 1/7/06
        local master = yes
        wins proxy = no
        wins support = yes

#       Added 9/06
        password server = yes
#
#       Added to reduce network traffic
        name resolve order = host wins bcast

        remote announce = 128.148.nn.255/DEPT 128.148.mmm.255/DEPT
128.148.ooo.255/DEPT 128.148.ppp.255/DEPT 128.148.qqq.255/DEPT

        invalid users = bin daemon sys adm tty disk lp mem kmem wheel mail
news uucp m
an games gopher dip ftp floppy utmp xfs console pppusers popusers
slipusers slocate gd
m filesystem root
        valid users = @deptusers @dept2users @users @stockroom @guest
        username map = /etc/samba/smbusers
        domain logons = yes
        guest ok = yes

        guest account = chemug
        hosts allow = 128.148.mmm. 128.148.nn. 128.148.ooo. 128.148.ppp.
128.148.qqq.
128.148.rrr.31 128.148.rrr.10 127.
        dos filetimes = Yes
        dos filetime resolution = Yes
##      Changes for cups
        load printers = yes
        printing = cups
        printcap name = /etc/printcap

#       Helps to eliminate "Access Denied"
#       on Windows NT, 2000, and XP
#
        password server = None
        use client driver = yes

#       Add 9/06

        disable spoolss = yes

[homes]
        comment = Home Directories
        writeable = yes
[printers]
        comment = All Printers
        path = /var/spool/samba
        guest ok = Yes
        printable = Yes

[1-Mac]
        comment = Distributed Software for MacIntoshes
        path = /chemusers/1-Mac
        volume = Utilities for MacIntoshes
        guest ok = yes
[1-Win]
        comment = Distributed Software for Windows
        path = /chemusers/1-Win
        volume = Utilities for Window Computers
        guest ok = yes

[Milling]
        comment = Contains the drop boxes for Milling requests
        path = /chemusers/milling
        volume = Milling Drop Box
        writeable = yes
        valid users = @chemusers
        force group = chemusers

[Stockroom]
        comment = Database for the Stockroom Applications
        path = /home/stockroom
        volume = Database for the Stockroom
        valid users = @stockroom
        writeable = yes
        create mask = 660
        directory mask = 0770

netstat -nlp | grep LISTEN| grep -v LISTENING

tcp        0      0 0.0.0.0:905
0.0.0.0:*                   LISTEN      4115/rpc.statd

tcp        0      0 0.0.0.0:781
0.0.0.0:*                   LISTEN      4418/rpc.mountd
tcp        0      0 0.0.0.0:111
0.0.0.0:*                   LISTEN      4095/portmap

tcp        0      0 0.0.0.0:445
0.0.0.0:*                   LISTEN      29710/smbd
tcp        0      0 0.0.0.0:767
0.0.0.0:*                   LISTEN      4403/rpc.rquotad



------------------------------

Message: 8
Date: Mon, 11 Feb 2008 11:53:52 -0500
From: Kirk Wight <kirk@xxxxxxxxxxx>
Subject: RE: Disk partitions and LVM limits
To: "redhat-list@xxxxxxxxxx" <redhat-list@xxxxxxxxxx>
Message-ID: <C3D5E7D0.10168%kirk@xxxxxxxxxxx>
Content-Type: text/plain;       charset="ISO-8859-1"

Hi Peter,
I'm also running a Dell MD1000 in RAID5 on a CentOS system (4.6), with LVM
on ext3.
I never came across a 2TB limit or your particular errors... I had one 1.4TB
LVM volume which I extended into the 3.6TB of the MD1000, for one large 5TB
LVM volume (mounted on root). The only problem I had was getting the driver
loaded at boot time (solved with a new initrc). I hope this helps...
Kirk
--

Kirk Wight
Administrateur de systèmes / Systems Administrator
kirk@xxxxxxxxxxx





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No virus found in this outgoing message.
Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1271 - Release Date: 2/11/2008 8:16 AM



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