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tape: format_media - implement special case for WORM media

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This commit is contained in:
Dietmar Maurer 2021-04-23 08:33:13 +02:00
parent a3b4b5b50e
commit 4be6beab6f
1 changed files with 28 additions and 15 deletions
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43
src/tape/drive/lto/sg_tape.rs
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@ -201,27 +201,40 @@ impl SgTape {
/// Format media, single partition
pub fn format_media(&mut self, fast: bool) -> Result<(), Error> {
self.rewind()?;
// get info about loaded media first
let (head, _, _) = self.read_compression_page()?;
let mut sg_raw = SgRaw::new(&mut self.file, 16)?;
sg_raw.set_timeout(Self::SCSI_TAPE_DEFAULT_TIMEOUT);
let mut cmd = Vec::new();
if MediumType::is_worm(head.medium_type) {
// We cannot FORMAT WORM media! Instead we check if its empty.
if MediumType::is_lto5_or_newer(head.medium_type) { // FORMAT requires LTO5 or newer)
cmd.extend(&[0x04, 0, 0, 0, 0, 0]);
sg_raw.do_command(&cmd)?;
if !fast {
self.erase_media(false)?; // overwrite everything
self.move_to_eom(false)?;
let pos = self.position()?;
if pos.logical_object_number != 0 {
bail!("format failed - detected WORM media with data.");
}
} else {
// try rewind/erase instead
self.erase_media(fast)?
}
Ok(())
Ok(())
} else {
self.rewind()?;
let mut sg_raw = SgRaw::new(&mut self.file, 16)?;
sg_raw.set_timeout(Self::SCSI_TAPE_DEFAULT_TIMEOUT);
let mut cmd = Vec::new();
if MediumType::is_lto5_or_newer(head.medium_type) { // FORMAT requires LTO5 or newer)
cmd.extend(&[0x04, 0, 0, 0, 0, 0]);
sg_raw.do_command(&cmd)?;
if !fast {
self.erase_media(false)?; // overwrite everything
}
} else {
// try rewind/erase instead
self.erase_media(fast)?
}
Ok(())
}
}
/// Lock/Unlock drive door