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Does Tru64 provide the soft raid function?

ericfjchen
Regular Advisor

Does Tru64 provide the soft raid function?

As title
12 REPLIES
Venkatesh BL
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Do you mean software RAID?...that is what LSM (Logical Storage Manager) of Tru64 provides.
Ivan Ferreira
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Yes, you can use LSM.

See the Logical Storage Manager Documentation. Part Number: AA-RH9BD-TE


Also, see volintro and volassist man pages.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Michael Schulte zur Sur
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Hi,

you will need an extra license for that product.

greetings,

Michael
Raj D.
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Hi ericfjchen ,

True64 provide LSM (Logical Storage Manager), and it supports UFS , AdvFS ..

It supports RAID 0 , 1 , 0+1 , and RAID 5.

Check this out for a good understanding :

http://h18000.www1.hp.com/products/quickspecs/12278_div/12278_div.html

Cheers ,
Raj.
" If u think u can , If u think u cannot , - You are always Right . "
ericfjchen
Regular Advisor

Re: Does Tru64 provide the soft raid function?

LSM is not default boundle on Tru64? Do we need another license for it?
Nguyen Anh Tien
Honored Contributor

Re: Does Tru64 provide the soft raid function?

If you take Full Installation that will
provides the following features:
· Choice of a graphical or text interface
· Dynamic disk partitioning
· Worldwide Language Support (WLS) software installation
· Logical Storage Manager (LSM) configuration option
· Automatic resolution of software dependencies during custom software
selection
· Ability to invoke user-supplied files prior to installation and after software
subset loading to customize the installation process
· Identification of physical disks
· UNIX shell option
HP is simple
Venkatesh BL
Honored Contributor

Re: Does Tru64 provide the soft raid function?

It is bundled with the Base OS kit. But, you require license to use it.
Han Pilmeyer
Esteemed Contributor

Re: Does Tru64 provide the soft raid function?

The LSM license is not required for all features of LSM. At least it is required for things like dxlsm and mirroring (probably any type of RAID).
Michael Schulte zur Sur
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Han,

using LSM without some form of RAID is like having a car without transmission ;-). Only a source for trouble but no use.

Michael
Han Pilmeyer
Esteemed Contributor

Re: Does Tru64 provide the soft raid function?

In the days when LSM was first introduced disks were less than 1 GB in size. In those days LSM could be used to create file systems and raw volumes that spanned multiple disks. That was certainly useful at the time.
Michael Schulte zur Sur
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Han,

you are right! That makes sense.

Michael
Hein van den Heuvel
Honored Contributor

Re: Does Tru64 provide the soft raid function?

Eric,

What problem are you trying to solve?

Hardware controllers are very capable raid-5 managers. Why bother the OS with that menial task? Why turn a single system IO into 4 (read data, read checksum, write data, write checksum).

Now if you are talking raid-1, more commonly referred to as mirroring, then that is a whole different problem nicely solved with LSM plexes. There software/OS level raid-1 give the big advantage of potentially using multiple distint, redundant, paths.

hth,
Hein.