RE: RAID5 degraded - system hangs

2007-03-06 Thread Michel, Dietmar
The Promise Tx4310 has to be a HW raid controller - hopefully ;-))
But to get full access you have to have drivers to support this hardware.
 
In the ata man pages the controller (chip is PDC40719) is mentioned to be 
supported.
But not in the RAID5 mode - that´s my mistake.
 
I just was realy irritated for after buliding up and even after rebooting 
without errors the device ar0 named itself RAID5 ...
 
Maybe I used parts of new code which isn´t finished at all 
 
Thanxs 
 
  Dietmar
 



From: Nikos Vassiliadis [mailto:[EMAIL PROTECTED]
Sent: Tue 3/6/2007 8:48 AM
To: freebsd-questions@freebsd.org
Cc: Michel, Dietmar
Subject: Re: RAID5 degraded - system hangs



On Monday 05 March 2007 17:22, Michel, Dietmar wrote:
[snip]
 Now I made an upgrade using 4 SATA II disks connected to a promise TX4310 
 Raid controller.

This must be a software RAID controller. It uses
software in your OS to do the several RAID levels.
The controller simply acts as a RAID controller
and then passes the real job to the OS.


 Defining a RAID5 a bios level, starting the server and building up the Raid 
 at OS level:
 And now I have a functional Raid named ar0.

No you probably don't have a functional RAID5 setup.
Please read the ataraid manual page. It says that
RAID5 is not supported.

[snip]
 Any hints?

You can use other RAID levels that are supported
for your controller. You can also use gmirror or
graid3.

HTH, Nikos



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Re: RAID5 degraded - system hangs

2007-03-06 Thread Nikos Vassiliadis
On Tuesday 06 March 2007 10:16, Michel, Dietmar wrote:
 The Promise Tx4310 has to be a HW raid controller - hopefully ;-))

Sorry, but it seems that's not the case...

Supporting RAID levels 0, 1, 5 and 10, the FastTrak TX4310
incorporates Promise's innovative new software RAID 5
solution ...

from here:
http://www.promise.com/company/press/press_news1_eng.asp?press_id=130
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RE: RAID5 degraded - system hangs

2007-03-06 Thread Michel, Dietmar
You are right again ...
I just have a short discussion about the controller with promise support:
It is a software Raid Controller and WebPAM (The Promise Raid software) is the 
interface for building/resync etc.
This interface has some advanced feature but at least you can use a Linux 
SW-Raid ... (the xor calculation for RAID5 is done by the server anyway).

Over all with the technical background I have to redesign my personal goals.

  Dietmar

-Original Message-
From: Nikos Vassiliadis [mailto:[EMAIL PROTECTED] 
Sent: Dienstag, 6. März 2007 10:06
To: freebsd-questions@freebsd.org
Cc: Michel, Dietmar
Subject: Re: RAID5 degraded - system hangs

On Tuesday 06 March 2007 10:16, Michel, Dietmar wrote:
 The Promise Tx4310 has to be a HW raid controller - hopefully ;-))

Sorry, but it seems that's not the case...

Supporting RAID levels 0, 1, 5 and 10, the FastTrak TX4310
incorporates Promise's innovative new software RAID 5
solution ...

from here:
http://www.promise.com/company/press/press_news1_eng.asp?press_id=130

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Re: RAID5 degraded - system hangs

2007-03-05 Thread Derek Ragona
I'm no expert, but have experienced a few RAID issues.  First, RAID 5 will 
become degraded and will try to rebuild upon a drive failure, once the 
failed drive is replaces.  In Mirrored RAID, RAID 1, or RAID 10, the system 
will continue to function on the good drive but will alert the 
administrator of the drive failure.


One last thing, SATA RAID drives, while they are often said to be 
hot-swapable, most manufacturer's recommend power-off then swap 
drives.  With SCSI hot swapable drives they can be swapped with power still on.


-Derek


At 09:22 AM 3/5/2007, Michel, Dietmar wrote:

Hi Guys,



I´m using an older Server with FreeBSD 6.2 als Fileserver in my home office.

Now I made an upgrade using 4 SATA II disks connected to a promise TX4310 
Raid controller.


Defining a RAID5 a bios level, starting the server and building up the 
Raid at OS level:


# atacontrol create RAID5 32 ad4 ad6 ad8 ad10

# bsdlable ...

# newfs ...



And now I have a functional Raid named ar0.



At boot time the bios told me that even at this level the raid in 
initializing - world seemed to be ok.




Now I tried to prove Raid function and disconnect one disk.

Theoretical data is covered by the rest of 3 ... but after I get the 
system message that one disk has been disconnected the maschine stopps working.


Told me: ar0 raid 5 degarded after a fw minutes no input is possibble.





Even after reboot



ar0: disk0 Ready
ar0: disk1 Ready
ar0: disk2 Ready
ar0: disk3 down no device found

... end of work



No single user mode or other starting option seemed to work.

I have no chance to rebuild the raid via atacontrol.



Any hints?

Raid without reliability doesn´t make sense!



Regards



  Dietmar

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Re: RAID5 degraded - system hangs

2007-03-05 Thread Nikos Vassiliadis
On Monday 05 March 2007 17:22, Michel, Dietmar wrote:
[snip]
 Now I made an upgrade using 4 SATA II disks connected to a promise TX4310 
 Raid controller.

This must be a software RAID controller. It uses
software in your OS to do the several RAID levels.
The controller simply acts as a RAID controller
and then passes the real job to the OS.

 
 Defining a RAID5 a bios level, starting the server and building up the Raid 
 at OS level:
 And now I have a functional Raid named ar0.

No you probably don't have a functional RAID5 setup.
Please read the ataraid manual page. It says that
RAID5 is not supported.

[snip]
 Any hints?

You can use other RAID levels that are supported
for your controller. You can also use gmirror or
graid3.

HTH, Nikos

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RE: RAID5 degraded - system hangs

2007-03-05 Thread Michel, Dietmar
Hi Derek,
 
at least your comment to SATA hot swap is right.
But disk failure are during work anyway. So at least after rebooting and 
replacing the disk (I reconnected the disk offline and powered on again) I had 
to had a chance to rebuild the array.
But as described I get no prompt in any boot option.
 
  Dietmar



From: Derek Ragona [mailto:[EMAIL PROTECTED]
Sent: Mon 3/5/2007 11:50 PM
To: Michel, Dietmar; freebsd-questions@freebsd.org
Subject: Re: RAID5 degraded - system hangs


I'm no expert, but have experienced a few RAID issues.  First, RAID 5 will 
become degraded and will try to rebuild upon a drive failure, once the failed 
drive is replaces.  In Mirrored RAID, RAID 1, or RAID 10, the system will 
continue to function on the good drive but will alert the administrator of the 
drive failure.

One last thing, SATA RAID drives, while they are often said to be hot-swapable, 
most manufacturer's recommend power-off then swap drives.  With SCSI hot 
swapable drives they can be swapped with power still on.

-Derek


At 09:22 AM 3/5/2007, Michel, Dietmar wrote:


Hi Guys,

 

I´m using an older Server with FreeBSD 6.2 als Fileserver in my home 
office.

Now I made an upgrade using 4 SATA II disks connected to a promise 
TX4310 Raid controller.

Defining a RAID5 a bios level, starting the server and building up the 
Raid at OS level:

# atacontrol create RAID5 32 ad4 ad6 ad8 ad10

# bsdlable ...

# newfs ...

 

And now I have a functional Raid named ar0.

 

At boot time the bios told me that even at this level the raid in 
initializing - world seemed to be ok.

 

Now I tried to prove Raid function and disconnect one disk.

Theoretical data is covered by the rest of 3 ... but after I get the 
system message that one disk has been disconnected the maschine stopps working.

Told me: ar0 raid 5 degarded after a fw minutes no input is possibble. 

 

 

Even after reboot 



ar0: disk0 Ready
ar0: disk1 Ready
ar0: disk2 Ready
ar0: disk3 down no device found

... end of work

 

No single user mode or other starting option seemed to work.

I have no chance to rebuild the raid via atacontrol.

 

Any hints?

Raid without reliability doesn´t make sense!



Regards

 

  Dietmar 

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