I just found a documented answer: On Mon, Sep 29, 2008 at 10:58 AM, Erik Persson <[EMAIL PROTECTED]> wrote:
> Hello! > > I am exerimenting with ZFS on a fibre channel connected storage system and > have run a minor annoyance. Ideally I would like to have all my storage > exported as ~1.5 TB LUNS from the disk system (2x750 GiB). > > Solaris detects these LUNS but it cannot use them. I get "cannot open > /dev/rdsk/c4$WWNdNp0" when trying to run fdisk. A Linux system has no > problems using the same LUN. > > If I reduce the size to half it does work, but I cannot shed the suspicion > that ZFS way of evently distributing I/O over available LUNs will cause a > performance hit as ZFS effectively will load balance over two regions on the > same disk platter. > > Is there a 1 TB LUN limit in opensolaris? The only other component involved > is the Qlogox 23xxx card that I use and the assiociated qlc driver. > Multiterabyte Disk Support With EFI Disk Labels This multiterabyte disk support is available only for systems that run a 64-bit kernel. This feature is new in the Software Express pilot program and in the Solaris 9 4/03 release. This feature is included in the Solaris 10 3/05 release. The Solaris 10 OS provides support for disks that are larger than 1 terabyte (Tbyte) on systems that run a 64-bit Solaris kernel. The Extensible Firmware Interface (EFI) label provides support for physical disks and virtual disk volumes. The UFS file system is compatible with the EFI disk label, and you can create a UFS file system that is greater than 1 Tbyte. This release also includes updated disk utilities for managing disks that are greater than 1 Tbyte. However, the SCSI driver, ssd, currently supports disks only up to 2 Tbytes. If you need greater disk capacity than 2 Tbytes, use a disk and storage management product such as Solaris Volume Manager to create a larger device. For more information on using the EFI disk label, see the System Administration Guide: Devices and File Systems<http://docs.sun.com/app/docs/doc/817-5093>. This guide contains important information and restrictions. This information concerns using the EFI disk label with existing software products. The Solaris Volume Manager software can also be used to manage disks that are greater than 1 Tbyte in this Solaris release. See Multiterabyte Volume Support in Solaris Volume Manager<http://docs.sun.com/app/docs/doc/817-0547/whatsnew-updates-31?a=view> . Ref: http://docs.sun.com/app/docs/doc/817-0547/whatsnew-updates-27?a=view _hartz
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