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тАО12-28-2009 05:44 PM
тАО12-28-2009 05:44 PM
Document on read/write on 2 servers
Do you guys know which document I can find that stated that 1 vdisk cannot read/write at the same time on 2 servers?
Thanks in advance.
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тАО12-28-2009 11:21 PM
тАО12-28-2009 11:21 PM
Re: Document on read/write on 2 servers
this is by design for the most filesystems. Only cluster filesystems can handle this. There is a lock manager, which manages the multiple access to the same file from more then one host.
Best regards,
Patrick
Patrick
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тАО12-28-2009 11:29 PM
тАО12-28-2009 11:29 PM
Re: Document on read/write on 2 servers
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тАО12-28-2009 11:48 PM
тАО12-28-2009 11:48 PM
Re: Document on read/write on 2 servers
I don't think that there is a document from HP. Maybe you will find something written by the operating system developer, if you're using windows the Microsoft TechNet would be advisable.
Best regards,
Patrick
Patrick
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тАО12-29-2009 01:09 AM
тАО12-29-2009 01:09 AM
Re: Document on read/write on 2 servers
Your customer is confusing things. There's other devices like NAS that can act as file servers, and share files for several servers.
A block server provides a series of empty data sectors, and then the operating system creates it's filesystem structures on it (FAT32 / NTFS / Extfs2 / LVM / etc). The OS keeps tables to know what data sectors belong to what files. These tables have to be updated by the OS in a consistent way.
If two independent operating systems use the same physical space, each one will create it's mapping between files and data sectors, and there will be a mix of both filesystems on the disk.