this fixed it: http://support.alfredapp.com/kb:not-finding-apps

meant “the san had become disconnected” or something (errno 5)

Or there isn’t a tape in that drive.

Or you’re accessing st10 instead of st6 accidentally

[ERROR] \dev\3.0\dps_trunk\prestapeservice\src\test\java\org\familysearch\digitalarchive\dpstapewriter\ActuallyWriteToTapeTest.java:[16,4] as of release 1.4, ‘assert’ is a keyword, and
may not be used as an identifier
[ERROR] (use -source 1.3 or lower to use ‘assert’ as an identifier)
[ERROR] assert subject.thisBlocksCrcFinalValues.size() == 0;
[ERROR] \dev\3.0\dps_trunk\prestapeservice\src\test\java\org\familysearch\digitalarchive\dpstapewriter\ActuallyWriteToTapeTest.java:[16,18] ‘;’ expected
[ERROR] \dev\3.0\dps_trunk\prestapeservice\src\test\java\org\familysearch\digitalarchive\dpstapewriter\ActuallyWriteToTapeTest.java:[16,48] <identifier> expected
[ERROR] \dev\3.0\dps_trunk\prestapeservice\src\test\java\org\familysearch\digitalarchive\dpstapewriter\ActuallyWriteToTapeTest.java:[16,50] ‘;’ expected
[ERROR] -> [Help 1]

meant “you are putting an assert outside a method body!”

1>MSVCRTD.lib(ti_inst.obj) : fatal error LNK1112: module machine type ‘X86′ conflicts with target machine type ‘x64′

this meant “your properties -> VC++ Directories -> Library Directories” is pointing to a directory that has 32 bit libs built in it. Fix somehow!

In my case http://social.msdn.microsoft.com/Forums/ar/vcgeneral/thread/c747cd6f-32be-4159-b9d3-d2e33d2bab55

just use a byte it “should work”

ref: http://en.wikipedia.org/wiki/Java_Native_Interface#Mapping_types

http://jna.java.net/javadoc/overview-summary.html#marshalling

Exception in thread “main” java.lang.Error: Exception reading field ‘interface_id’ in class sg_io_hdr_t: java.lang.IllegalAccessException: Class com.sun.jna.Structure can not access a member of class sg_io_hdr_t with modifiers “public”
at com.sun.jna.Structure.getField(Structure.java:468)
at com.sun.jna.Structure.calculateSize(Structure.java:788)
at com.sun.jna.Structure.allocateMemory(Structure.java:290)
at com.sun.jna.Structure.<init>(Structure.java:177)
at com.sun.jna.Structure.<init>(Structure.java:167)
at com.sun.jna.Structure.<init>(Structure.java:163)
at com.sun.jna.Structure.<init>(Structure.java:154)
at com.ochafik.lang.jnaerator.runtime.Structure.<init>(Structure.java:29)
at sg_io_hdr_t.<init>(Yo.java:124)
at Yo.sendScsiCommand(Yo.java:64)
at Yo.rewindTape(Yo.java:38)
at Yo.main(Yo.java:33)

meant “you need to make that class public or it won’t instantiate right [I guess]“

javac -cp \*.jar Yo.java
Yo.java:2: package com.sun.jna does not exist
import com.sun.jna.Library;
^
Yo.java:3: package com.sun.jna does not exist
import com.sun.jna.Native;
^
Yo.java:4: package com.sun.jna does not exist
import com.sun.jna.Platform;
^
Yo.java:5: package com.sun.jna does not exist
import com.sun.jna.Pointer;
^
Yo.java:6: package com.ochafik.lang.jnaerator.runtime does not exist
import com.ochafik.lang.jnaerator.runtime.Structure;
^
Yo.java:7: package com.sun.jna does not exist
import com.sun.jna.Pointer;
^
Yo.java:15: cannot find symbol
symbol : class Library
location: class Yo
public interface CLibrary extends Library {
^
Yo.java:49: cannot find symbol
symbol: class Structure
class sg_io_hdr_t extends Structure<sg_io_hdr_t, sg_io_hdr_t.ByValue, sg_io_hdr_t.ByReference > {
^
Yo.java:92: package Structure does not exist
public static class ByValue extends sg_io_hdr_t implements Structure.ByValue {
^
Yo.java:89: package Structure does not exist
public static class ByReference extends sg_io_hdr_t implements Structure.ByReference {
^
Yo.java:57: cannot find symbol
symbol : class Pointer
location: class sg_io_hdr_t
public Pointer dxferp;
^
Yo.java:59: cannot find symbol
symbol : class Pointer
location: class sg_io_hdr_t
public Pointer cmdp;
^
Yo.java:61: cannot find symbol
symbol : class Pointer
location: class sg_io_hdr_t
public Pointer sbp;
^
Yo.java:66: cannot find symbol
symbol : class Pointer
location: class sg_io_hdr_t
public Pointer usr_ptr;
^
Yo.java:17: cannot find symbol
symbol : variable Platform
location: interface Yo.CLibrary
Native.loadLibrary((Platform.isWindows() ? “msvcrt” : “c”),
^
Yo.java:17: cannot find symbol
symbol : variable Native
location: interface Yo.CLibrary
Native.loadLibrary((Platform.isWindows() ? “msvcrt” : “c”),
^
Yo.java:81: cannot find symbol
symbol : method setFieldOrder(java.lang.String[])
location: class sg_io_hdr_t
setFieldOrder(new String[]{“interface_id”, “dxfer_direction”, “cmd_len”, “mx_sb_len”, “iovec_count”, “dxfer_len”, “dxferp”, “cmdp”, “sbp”, “timeout”, “flags”, “pack_id”, “usr_ptr”, “status”, “masked_status”, “msg_status”, “sb_len_wr”, “host_status”, “driver_status”, “resid”, “duration”, “info”});
^
Yo.java:87: cannot find symbol
symbol : variable Structure
location: class sg_io_hdr_t
return Structure.newArray(sg_io_hdr_t.class, arrayLength);
^
18 errors

meant “you don’t have all the jars in your classpath, do it like this intead” (I guess..bash woe?)
$ javac -cp jna.jar:jnaerator-0.9.10-SNAPSHOT-shaded.jar Yo.java

http://code.google.com/p/jnaerator/ apparently

I think what you want is “alfred” http://itunes.apple.com/us/app/alfred/id405843582?mt=12

this with an on drive verify “error” sense data response of

f0 00 08 00 00 00 01 12 00 00
00 00 00 05 00 00 00 00 32 05
10 01 00 00 00 00

(08 00 05) meant “when passing in the verify command, you have too many values in the length field, so it’s expecting more files than are on tape” and erring.