UDF is known as a file system for DVDs. But very few people know that hard disk drives can also be formatted as UDF. A UDF- formatted HDD can be read by Windows 98 and Windows XP without any special drivers, Windows Explorer seems to work fine with it. A special file system driver by SAI allows to read and write UDF-formatted HDDs under Win98 and WinXP. The UDF file system allows theoretically very large file sizes, and it is not Microsoft, but open. Cdr king mouse drivers for mac. A UDF-formatted HDD can be set from read-write to read-only by turning off the special file system driver. I have attached 3 screenshots of the properties sheet of a UDF-formatted 80 GB HDD, under Win98 and WinXP. Under Win98 the UDF-formatted HDD has 2 drive letter (one is not accessible) when the special file system driver is active, but only 1 drive letter when the MS read-only driver is active. Under WinXP a UDF-formatted HDD has always a single drive letter, regardless of the driver. SAI refers in their documentation to CDs and DVDs, not to HDDs. UDF-formatted HDDs seem to be uncharted territory under Win98. There are very few software tools for UDF-formatted HDDs. Acronis Disk Director Suite 10.0, for example, displays 'File system error: Invalid format', Norton Disk Doctor displays 'Unable to read from drive J:' and ScanDisk 'cannot check this drive because there is no disk in it, it is not formatted or a disk utility has locked it'. Are there tools to handle UDF-formatted HDDs? Are there any horror stories about them? Does anybody have any experience with them? What are the benefits or disadvantages of a UDF-formatted HDD vs NTFS or FAT32? Could there be any special uses? Win98 Explorer has a major problem with file deletes when IE6 is installed - but maybe there is no such problem on a UDF-formatted HDD? Maybe some bugs of Win98 occur only on FAT/FAT32 partitions, but not on a UDF-formatted HDD? P5kpl am epu driver for mac. The p5kpl-am epu may be a factory second or a new, unused item with defects or irregularities. The product electricalelectronic equipment, Mercury-containing button cell battery should not be. UDF Drivers for Windows XP for Use with DVD-RAM Reply #5 – 2006-03-05 09:53:10 You can format a DVD-RAM using the FAT32 or UDF file system in order to use it like a HDD (similar to CD-MRW). Windows Vista and 7 have full support up to UDF v2.6, but the UDF block size has the same constraint. Linux 2.6 supports UDF fully up to 2.01 and Linux 2.6.26 up to 2.5. However, before Linux 2.6.30 a command line option is necessary to mount if the UDF block size is not 2048. ![]() I seem to come across multiple-drive-letter problems quite regularly, do they occur also with a UDF-formatted HDD, which can have only one partition? Can USB sticks and SDHC card be formatted as UDF and be read and written to under Win98? ![]() Any ideas and suggestions about UDF-formatted HDDs are welcome. Edited June 8, 2013 by Multibooter. Advantages over NTFS: - No journaling - better performance - no trouble with permissions - Acessible with multiple operating systems Advantages over FAT32: - Can handle bigger files Windows 98 can work with version 1.02. Since its behaviour is something that has not been tested yet with harddisks it might be interesting. I use UDF for DVDs and videocapturing. It is just a question how can other applications handle different filesystem. Brother Printer Drivers For MacGenerally there should be no trouble. Is there any disk tool available, such as scandisk or chkdsk to scan the drive for errors? And what exact method you have used for formatting? Edited November 4, 2009 by Offler. Reading from a 2TiB HDD under Win98 I have formatted a 2TB HDD to UDF v1.02. The UDF-formatted 2TB HDD is accessible, without special software, as read-only under both Win98SE and WinXP SP2. The Sata rev3.0 2TB HDD (6.0 Gb/s, 64MB cache, 72000 RP/M) was inserted in a Kingwin USB 2.0 EZ-Dock2 docking station (2 slots for altogether 2 HDDs) and connected to a USB 2.0 PCCard in my 11-year-old Inspiron laptop. The EZ-Dock2 was using nusb v3.3. I am still experimenting, but it looks like the whole 2TBs of the HDD are accessible under Win98SE, without any special software. There is no 137GB limit for UDF-formatted HDDs connected via USB under Win98. The 2TB UDF-formatted HDD was accessed Ok via USB on a near-virgin Win98SE system, on which no 137GB patch (ESDI_506.PDR) was installed [this patch is not needed for HDDs connected via USB]. Under Win98 the 2TB HDD had been set in Device Manager as Removable so that it gets assigned a drive letter, under WinXP the 2TB HDD is recognized immediately as 'Local Disk'. Wikipedia states as limit of the UDF filesystem '2 TiB (hard disk), 8 TiB (optical disc) (2^^32 times blocksize)'. Udf Drivers For XpMaybe larger HDDs (up to 16TiB?), with 4kB sectors, can be formatted to UDF and read under Win98 without special software, in the USB enclosures with the JMicron chip But right now I am happy that the 2TB UDF-formatted HDD seems to work Ok under Win98SE and WinXP. Here an excellent review of the UDF filesystem: The article 'Wenguang's Introduction to Universal Disk Format (UDF)' is not available anymore at the link indicated by Offler in posting #3, but can be found at I am attaching a screen shot of the Properties sheet of the 2TB HDD under Win98SE. In the screen shot '0 bytes Free space' shows that the 2TB HDD is read-only, similar to a huge DVD-+R. Read-only media cannot be overwritten by mistake or infected by e.g. Exe infectors.
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