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java linux 시스템 정보 disk 가져오기

FileSystemUsage usage;

            try {
                usage = sigar.getFileSystemUsage(fs.getDirName());
            } catch (SigarException e) {
                if (fs.getType() == FileSystem.TYPE_LOCAL_DISK) {
                    throw e;
                }
                //else ok, e.g. floppy drive on windows
                continue;
            }

            switch (fs.getType()) {
              case FileSystem.TYPE_LOCAL_DISK:
                assertGtZeroTrace("  Total", usage.getTotal());
                //possible machines have full filesystems
                assertGtEqZeroTrace("  Free", usage.getFree());
                assertGtEqZeroTrace("  Avail", usage.getAvail());
                assertGtEqZeroTrace("   Used", usage.getUsed());
                double usePercent = usage.getUsePercent() * 100;
                traceln("  Usage=" + usePercent + "%");
                assertTrue(usePercent <= 100.0);
              default:
                traceln("  DiskReads=" + usage.getDiskReads());
                traceln("  DiskWrites=" + usage.getDiskWrites());
            }

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