Share a disk between 2 servers?

We have a situation where we're thinking of mounting a LUN on our SAN to 2 hosts, where one would have a writeable filesystem & the other read-only. Would save us having 2 copies of the same data. Right now both Sun servers are running Solaris 9.
If the writing host puts all the data on the filesystem, then the 2nd mounts it read-only and there is no change, no problem (we think). But, if the 2nd RO host has accessed a file recently so it's cached, and the 1st RW host modifies the file, and the 2nd RO host gets another request for that file, how does the 2nd system "know" the file has changed? Sorry for such technical terminology. ;-)
So, can we make this work or not? Thanks for any help/advice.
David Strom

Correct. UFS does not support multiple simultaneous mounts. Worse than some files being cached and not updated, some bits of the filesystem could be cached the same way. It's possible that two inconsistent pieces of the filesystem could be read in a way that would lead to a panic of the R/O machine.
To do this right, you'd need to access the raw device and do your own arbitration and disk format (like Oracle RAC), use NFS from one host, or use a filesystem that supports multiple simultaneous mounts (eg. Veritas Cluster Filesystem, Sun QFS, ADIC StorNext)
Darren

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Share external disk between Mac and Windows

I know this topic crops up a lot, but nobody has given a clear and simple explanation of how to do this.
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Hi,
Would I still be able to create Extended/Journaled partitions on it to use with SuperDuper in making bootable backups of my main iMac disk? Cheers for the help!
not while using the MBR partition scheme.
For bootable OSX clones/partitions you have to use GPT (GUID partition table), which on the other hand can prevent the usage of the harddisk with PCs.
When you restrict the usage of the external HD to your Mac (with propably using BootCamp Windows) then GPT isn't usually an issue, but when switching the HD between your Mac and a Windows PC, then it can happen, that the PC is not able to see/use the partitions on the HD.
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Regards
Stefan

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Hi WSUAL2,
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http://blogs.technet.com/b/kevinholman/archive/2012/04/28/opsmgr-2012-configure-notifications.aspx
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How do I use the time capsule to share itunes music between multiple apple devices? Also, is it possible to control the music on one device using another, and how do you set this up?

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unless i'm missing something, i think you got mixed up, this is easy google for walk throughs
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HT3819 how do I share movies/music between my computers. I have opened shared on both computers and both are on, but i am not able to drag anything from one to the other. Does anyone know where the settings button is on the bottom of the itunes screen?

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How can I share a folder between two users on the same mac?

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jrwood116 wrote:
Thanks, but do you have to do that every time you share a folder?
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I've read numerous 'how to share a folder' blogs and they just say it's as simple as clicking 'share' and allowing specific users to access it...none have mentioned this (not saying your advice is wrong at all, just don't get why no-one else has mentioned what appears to be a key step!)
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Can i share iTunes music between my kids with different apple id's?

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TS4001 How can I share Safari bookmarks between two iCloud accounts using IOS 7 and Mavericks?

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David,
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It is possible to share a library between two users on the same mac?

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Share a disk between 2 servers?

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