XPost: comp.os.linux.advocacy, comp.sys.mac.advocacy
From: justin@nobecauseihatespam.edu
On Thu, 19 Nov 2015 20:33:34 -0500
Justin wrote:
> 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_en_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
>
>
49 minutes on exFAT with the 512B cluster size.
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