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    SubjectRe: [PATCH] scsi: devinfo: Add Microsoft iSCSI target to 1024 sector blacklist
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    On 03/28/2018 11:33 PM, Long Li wrote:
    >> Subject: Re: [PATCH] scsi: devinfo: Add Microsoft iSCSI target to 1024 sector
    >> blacklist
    >>
    >>
    >> Long, KY: Please confirm.
    >>
    >>> The Windows Server 2016 iSCSI target doesn't work with the Linux
    >>> kernel initiator since the kernel started sending larger requests by
    >>> default, nor does it implement the block limits VPD page. Apply the
    >>> sector limit workaround for these targets.
    >>>
    >>> Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
    >>> ---
    >>> drivers/scsi/scsi_devinfo.c | 2 +-
    >>> 1 file changed, 1 insertion(+), 1 deletion(-)
    >>>
    >>> diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
    >>> index f3b1172..5cb748a 100644
    >>> --- a/drivers/scsi/scsi_devinfo.c
    >>> +++ b/drivers/scsi/scsi_devinfo.c
    >>> @@ -213,7 +213,7 @@ static struct {
    >>> {"Medion", "Flash XL MMC/SD", "2.6D", BLIST_FORCELUN},
    >>> {"MegaRAID", "LD", NULL, BLIST_FORCELUN},
    >>> {"MICROP", "4110", NULL, BLIST_NOTQ},
    >>> - {"MSFT", "Virtual HD", NULL, BLIST_NO_RSOC},
    >>> + {"MSFT", "Virtual HD", NULL, BLIST_MAX_1024 | BLIST_NO_RSOC},
    >
    > Ross,
    >
    > What about storage_channel_properties.max_transfer_bytes returned from VSTOR_OPERATION_QUERY_PROPERTIES (in storvsc_channel_init())
    >
    > Does it return correctly the maximum transfer size for iSCSI?
    >

    I presume you're referring to the Hyper-V virtual storage driver? This
    has nothing to do with that module -- I don't even have it compiled in.
    It's just simply the Linux kernel initiator connecting over plain
    software iSCSI to a Windows Server 2016 iSCSI target.

    This is easy enough to reproduce. Just set up a Windows Server 2016
    target and try and use it from Linux. You get I/O errors as soon as you
    try and format the disk.

    Cheers,
    --
    Ross Lagerwall

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