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Dell NetWorker 19.9 Administration Guide

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SCSI data block size issues between UNIX and Windows

Different SCSI hardware limitations exist between UNIX and Microsoft Windows operating systems. This can lead to data block size compatibility problems (although they are less likely to occur now than in the past, given larger Fibre-Channel capacities). For example, with a device defined in UNIX that is physically attached to a Windows HBA, it is possible to define a block size greater than that allowed by the Windows hardware. This could lead to I/O errors in both write and read states on the device. In order to use both operating systems, it is necessary to determine a block size that is acceptable to both.

NOTE:In NetWorker 8.0.1 and later, the default block size for an LTO device increases from 128 KB to 256 KB. When NetWorker labels a new or used volume in an LTO device and the Device block size attribute of the device is handler default, the label operation uses a 256 KB block size.

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