XPost: comp.os.linux.advocacy, comp.sys.mac.advocacy   
   From: justin@nobecauseihatespam.edu   
      
   50 GB file - the ZIM file form wikipedia.   
      
   I used UDF 2.01 for compatibility.   
   I used a 64GB USB 3 drive, Corsair Voyager Vega, on my Late 2013 15" MacBook   
   Pro.   
   The transfer took just over and under 50 minutes.  I did the UDF test while I   
   was at work, and doing all sorts of other work related crap, so the transfer   
   was probably slower than it should have been.  I will run the test again.   
   After each test I zeroed out the first meg or two of the drive (dd   
   if=/dev/zero...) and reformatted using newfs_udf and newfs_exfat respectively.   
   UDF was 512B allocation unit (cluster) size while the exFAT was 13,1072B.    
   This was a mistake, I wanted both to be 512.  The larger cluster size on exFAT   
   is probably responsible for the lower time.   
      
   MD5 (Downloads/wikipedia_en_all_2015-05.zim) = 2dabe5cf628a54f6edc97ac77b7c7c52   
   50,900,153,262B Jun 17 21:02 wikipedia_en_all_2015-05.zim   
      
   UDF:   
   $ time cp wikipedia_en_all_2015-05.zim /Volumes/Corsair64GB/   
   wikipedia_en_all_2015-05.zim -> /Volumes/Corsair64GB/wikipedia_e   
   _all_2015-05.zim   
   real	53m11.412s   
   user	0m0.084s   
   sys	0m46.543s   
   50,900MB/3,191s = 15.9MB/s   
      
   exFAT:   
   $ time cp wikipedia_en_all_2015-05.zim /Volumes/Corsair64GB/   
   real	47m38.782s   
   user	0m0.129s   
   sys	0m51.018s   
   50,900MB/2,858s = 17.80MB/s   
      
      
   So, it would seem UDF 2.01 is a more viable option than exFAT.   
   I'm going to run the test again, with exFAT's cluster size at 512B.   
      
      
   Here's all the info when the drive was formatted to both FS's.   
   $ diskutil info /Volumes/Corsair64GB/   
      
      Device Identifier:        disk2   
      Device Node:              /dev/disk2   
      Part of Whole:            disk2   
      Device / Media Name:      Corsair Voyager VEGA Media   
      Volume Name:              Corsair64GB   
      Mounted:                  Yes   
      Mount Point:              /Volumes/Corsair64GB   
      File System Personality:  UDF   
      Type (Bundle):            udf   
      Name (User Visible):      Universal Disk Format (UDF)   
      Content (IOContent):      None   
      OS Can Be Installed:      No   
      Media Type:               Generic   
      Protocol:                 USB   
      SMART Status:             Not Supported   
     Total Size:               62.0 GB (61951967232 Bytes) (exactly 120999936   
   512-Byte-Units)   
      Volume Free Space:        10.9 GB (10917155840 Bytes) (exactly 21322570   
   512-Byte-Units)   
      Device Block Size:        512 Bytes   
      Allocation Block Size:    512 Bytes   
      Read-Only Media:          No   
      Read-Only Volume:         No   
      Ejectable:                Yes   
      Whole:                    Yes   
      Internal:                 No   
      OS 9 Drivers:             No   
      Low Level Format:         Not supported   
      
   exFAT   
      
   $ diskutil info /Volumes/Corsair64GB/   
      Device Identifier:        disk2   
      Device Node:              /dev/disk2   
      Part of Whole:            disk2   
      Device / Media Name:      Corsair Voyager VEGA Media   
      Volume Name:              Corsair64GB   
      Mounted:                  Yes   
      Mount Point:              /Volumes/Corsair64GB   
      File System Personality:  ExFAT   
      Type (Bundle):            exfat   
      Name (User Visible):      ExFAT   
      Content (IOContent):      None   
      OS Can Be Installed:      No   
      Media Type:               Generic   
      Protocol:                 USB   
      SMART Status:             Not Supported   
      Volume UUID:              0FDE1168-F150-3E27-9CFD-CDFDB82ACE12   
      Total Size:               62.0 GB (61951967232 Bytes) (exactly 120999936   
   512-Byte-Units)   
      Volume Free Space:        61.9 GB (61940170752 Bytes) (exactly 120976896   
   512-Byte-Units)   
      Device Block Size:        512 Bytes   
      Allocation Block Size:    131072 Bytes   
      Read-Only Media:          No   
      Read-Only Volume:         No   
      Ejectable:                Yes   
      Whole:                    Yes   
      Internal:                 No   
      OS 9 Drivers:             No   
      Low Level Format:         Not supported   
      
      
   --   
   x2w7ipoprfkuvswz   
   BM-2cTJKPDb8pmp6UKJLrZdhB7SojBJrBzznT   
      
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