test sfdisk, optimal_iosize

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Hi,

I've got some test failures like

--- /home/abuild/rpmbuild/BUILD/util-linux-2.27.git247.4c01c/tests/expected/sfdisk/dos-activate
+++ /home/abuild/rpmbuild/BUILD/util-linux-2.27.git247.4c01c/tests/output/sfdisk/dos-activate
@@ -6,7 +6,7 @@
 Disk <removed>: 50 MiB, 52428800 bytes, 102400 sectors
 Units: sectors of 1 * 512 = 512 bytes
 Sector size (logical/physical): 512 bytes / 4096 bytes
-I/O size (minimum/optimal): 4096 bytes / 32768 bytes
+I/O size (minimum/optimal): 4096 bytes / 64 bytes
 Disklabel type: dos
 Disk identifier: <removed>


optimal < minimum ... is this a bug?

Where does this optimal iosize come from, scsi_debug module?
Is there a commandline tool to get this iosize, maybe blkid?

cu,
Rudi
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