[CentOS] partitions vs. LVs [was: Re: How to upgrade from 5.8 to 6.2]

Steve Clark sclark at netwolves.com
Sun Jun 24 18:58:08 UTC 2012


On 06/24/2012 12:24 PM, ken wrote:
>
> On 06/24/2012 12:04 PM Steve Clark wrote:
>> On 06/24/2012 11:21 AM, ken wrote:
>>> On 06/24/2012 09:41 AM Benjamin Franz wrote:
>>>> On 06/24/2012 12:05 AM, Gene Heskett wrote:
>>>>> And what do you do when this LVM goes corrupt in about a month? I've
>>>>> had it self destruct on me twice. I hate it when that happens.
>>>> I would look for some other issue like bad hardware. Over the last
>>>> several years I've routinely used LVM for pretty much everything and
>>>> have never had it go corrupt on me except when there was a hardware
>>>> failure involved. My standard buildouts use LVM over RAID.
>>> Gene,
>>>
>>> Yeah, the problem is more than likely in your hardware.  I've used it on
>>> hundreds of machines and since 1999 and never had a problem traceable to
>>> LVM.  On the other hand, I've seen a lot of disks go bad.
>>>
>>> _______________________________________________
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>>>
>> What I don't like about LVM. at least on a personal system, is it
>> obfuscates where things are if you have multiple
>> underlying drives. You can't just do a df -h and see what the physical
>> layout really is. I guess there are some
>> pvdisplay and lvdisplay commands that can show this - but I always have
>> to look them up and when things go
>> kaflooey and your system isn't working then what - bring out the rescue
>> cd and hope you can figure it out.
>>
>>
>> --
>> Stephen Clark
>> *NetWolves*
>> Director of Technology
>> Phone: 813-579-3200
>> Fax: 813-882-0209
>> Email: steve.clark at netwolves.com
>> http://www.netwolves.com
> It helps during their creation, rather than just accepting the defaults,
> to give the LVs meaningful names.  But even if you don't:
>
> # df -H
> Filesystem             Size   Used  Avail Use% Mounted on
> /dev/mapper/VolGroup00-lvroot
>                           31G    12G    18G  39% /
> /dev/mapper/VolGroup00-lvtmp
>                          195M    55M   131M  30% /tmp
> /dev/mapper/VolGroup00-lvvar
>                           21G   1.2G    19G   6% /var
> /dev/mapper/VolGroup00-lvhome
>                          185G    40G   136G  23% /home
> /dev/hda3              518M    46M   446M  10% /boot
>
>
> Where's the difficulty?
>
What are the underlying actual physical devices?


-- 
Stephen Clark
*NetWolves*
Director of Technology
Phone: 813-579-3200
Fax: 813-882-0209
Email: steve.clark at netwolves.com
http://www.netwolves.com



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