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Who When What Removed Added
Hai Huang 2013-11-25 13:57:48 UTC CC hhuang, rhod
Assignee virt-maint kraxel
Gerd Hoffmann 2013-11-25 14:59:22 UTC Status NEW ASSIGNED
juzhang 2013-11-26 02:51:20 UTC CC flang
Gerd Hoffmann 2013-11-28 10:17:12 UTC CC virt-bugs
Flags needinfo?(virt-bugs)
juzhang 2013-11-29 02:07:55 UTC Flags needinfo?(virt-bugs) needinfo?(flang) needinfo?(flang)
langfang 2013-12-04 03:44:15 UTC Flags needinfo?(flang) needinfo?(flang)
Gerd Hoffmann 2013-12-04 10:37:26 UTC CC pbonzini
Flags needinfo?(pbonzini)
Paolo Bonzini 2013-12-05 10:46:05 UTC CC kraxel
Flags needinfo?(pbonzini) needinfo?(kraxel)
Gerd Hoffmann 2013-12-05 12:48:10 UTC Flags needinfo?(kraxel)
Gerd Hoffmann 2013-12-11 11:24:32 UTC Flags needinfo?(rhod)
Ronen Hod 2013-12-11 11:52:13 UTC CC virt-docs
Flags needinfo?(rhod) needinfo?(virt-docs)
Tahlia Richardson 2013-12-12 00:26:53 UTC Flags needinfo?(virt-docs)
Tahlia Richardson 2013-12-12 00:29:27 UTC Blocks 1040714
Gerd Hoffmann 2014-01-17 10:41:04 UTC Flags needinfo?(rhod)
Ronen Hod 2014-01-19 10:27:15 UTC Status ASSIGNED CLOSED
Resolution --- CANTFIX
Flags needinfo?(rhod)
Last Closed 2014-01-19 05:27:15 UTC
Yoana Ruseva 2014-06-06 14:53:39 UTC CC yruseva
Doc Text The SeaBIOS application runs in real mode for compatibility with BIOS interfaces. This limits the amount of memory available. As a consequence, SeaBIOS is only able to handle a limited number of disks. Currently, the supported number of disks is:

virtio-scsi — 64
virtio-blk — 4
ahci/sata — 24 (4 controllers with all 6 ports connected)
usb-storage — 4

As a workaround for this problem, when attaching a large number of disks to your virtual machine, make sure that your system disk has a small pci slot number, so SeaBIOS sees it first when scanning the pci bus. It is also recommended to use the virtio-scsi device instead of virtio-blk as the per-disk memory overhead is smaller.
Doc Type Bug Fix Known Issue

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