FAQ:Data Analysis System

Is there any restriction of characters or symbols in creating file names or directory names in the HSM filesystem?

Yes, there are some restrictions. Please do NOT use the following characters when creating files or directories in the HSM filesystem.

  • \ (back slash) or ¥ (yen mark)
  • ASCII code: 5c (hexadecimal )
  • blank
  • When a blank character is used as a last character of the file name.
  • ASCII code: 20 (hexadecimal)

I cannot read the HSM file, which exists in the HPSS area only.

When you cannot read the file in the HSM filesystem, there are the following possibilities.

  • All of the tape drives are used so that your file cannot be staged.
  • The tape cartridge which contains your file is already used by another process so that your file cannot be staged.
  • Your file cannot be staged due to the problem.

HSM file sometimes exists in HSM disk area, sometimes exits in both HSM disk and HPSS area, and sometimes exists in the HPSS area only. You can check the file location by ghils command.

  $> ghils /ghi/fs02/test/
  H /ghi/fs02/test/hpss_ghi_ls.10
  B /ghi/fs02/test/hpss_ghi_ls.11
  G /ghi/fs02/test/hpss_ghi_ls.12↓
  • G: The file exists only on the GHI disk.
  • B: The file exists both on the GHI disk and the HPSS.
  • H: The file exists only on the HPSS and not on the GHI disk.

When the file exists in the HPSS area, the file need to be staged to HSM disk area, which is called GHI_stage.

Recommended actions:

  • All of the tape drives are used so that your file cannot be staged.
    • You can check the available numbers of the tape drives on the work servers by ghitapedrive command. When no tape drive is vacant, the requested tape cartridge cannot be read so that file cannot be staged. Please wait until a tape drives is available.If the command is failed, please retry to access your file.
  • The tape cartridge which contains your file is already used by another process so that your file cannot be staged.
    • When another process completed the access to the tape cartridge, the tape cartridge is available for next process. Please wait for a while and retry to access your file. If you wait for several hours and failed to access the HSM file, please contact consult@kek.jp

I want to stage files before submiting LSF jobs.

Please confirm the status of target files by using ghils command.
If ghils shows "H", which means a file is only HPSS tape, please stage files refer to "Staging files".


Last-modified: 2017-01-23 (月) 11:48:05 (786d)