Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

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[CentOS] GPT Partitions 2.2T with Centos 5.5

Dear all, unfortunately I observe drastic drops in read- performance when I connect LUNs 2.2T to our Centos 5.5 Servers. I suspect issues with the GUID Partition Table, since it happens reproducibly only on the LUNs 2.2T and goes back to normal performance when using a LUN 2T with normal,

Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

2010/7/14 Jens Neu jens@biotronik.com: Dear all, unfortunately I observe drastic drops in read-  performance when I connect LUNs 2.2T to our Centos 5.5 Servers. I suspect issues with the GUID Partition Table, since it happens reproducibly only on the LUNs 2.2T and goes back to normal

Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

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Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

Jens Neu writes: I think ext3 is a bit slow on so big LUNS, try xfs or similar? there is no official support for xfs in RHEL5, so that is not an option. Besides, I'm talking about a drop of 150mb/s to ~10mb/s read performance when cracking the 2.2T size. This is clearly not in the ext3

Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

I think ext3 is a bit slow on so big LUNS, try xfs or similar? there is no official support for xfs in RHEL5, so that is not an option. Besides, I'm talking about a drop of 150mb/s to ~10mb/s read performance when cracking the 2.2T size. This is clearly not in the ext3 (or FS for that

Re: [CentOS] GPT Partitions 2.2T with Centos 5.5

On Wednesday 14 July 2010, Jens Neu wrote: I think ext3 is a bit slow on so big LUNS, try xfs or similar? there is no official support for xfs in RHEL5, so that is not an option. Besides, I'm talking about a drop of 150mb/s to ~10mb/s read performance when cracking the 2.2T size. This is

[CentOS] GPT?

Hi All, I had a few 320gb sata drives that had OS X on them. Before that they were Windows for testing. I put them in an IBM eServer 335 and now trying to install CentOS 5.3 I get to the partition - Create custom. I take sda and create a swap and a software raid partition. Same with sdb

Re: [CentOS] GPT?

I try to proceed and I get: boot partition is on a disk using GPT partitioning scheme but this machine cannot boot using GPT. I have never seen this before. Advice? Sure, drop into a shell (boot to a rescue mode for example) and relabel the discs. Use parted and its mklabel command and change

Re: [CentOS] GPT?

Hi Joseph, I try to proceed and I get: boot partition is on a disk using GPT partitioning scheme but this machine cannot boot using GPT. I have never seen this before. Advice? Sure, drop into a shell (boot to a rescue mode for example) and relabel the discs. Use parted and its

Re: [CentOS] GPT?

Can I do this from an install though? Or should I use a LiveCD? The drives in her ewont boot at this point. The install DVD will let you boot to a rescue mode, instead of typing linux. Once in that mode, skip net and install scan. Then when you drop in to a shell, go into parted. You are

Re: [CentOS] GPT?

ML wrote: Hi Joseph, I try to proceed and I get: boot partition is on a disk using GPT partitioning scheme but this machine cannot boot using GPT. I have never seen this before. Advice? Sure, drop into a shell (boot to a rescue mode for example) and relabel the discs.

Re: [CentOS] GPT?

John, boot the installl CD and get into the rescue shell (from the startup menu), then use something like dd if=/dev/zero of=/dev/sda bs=1024 count=1024 note thats sda and not sda1 or whatever, we want the raw device and not the partition. Just the ticket! You da man Thank