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2016 Feb 25
3
[PATCH 1/5] fat: fix minfatsize for large FAT32
Hi Ady, On 2016.02.25 02:08, Ady via Syslinux wrote: > There is an "extra" sector, in comparison to... what exactly? Sorry if I wasn't clear. I think I implied that the Large FAT32 fat size had an extra sector compared to minfatsize, when of course I meant the opposite (the Large FAT32 has one less sector than the minfatsize computed by the unpatched code, hence the check fails). The additional sector I was talking about is from the (unpatched) minfatsize variable comp...
2016 Feb 26
4
[PATCH 1/5] fat: fix minfatsize for large FAT32
Hi Ady, Your insightful post prompted me to to a little bit more digging as to how the Ridgecrop algorithm computed its FAT size, with the result of my investigations presented below. NB: For those who don't want to go through this whole part, there's a TL;DR near the end. For reference, the computation of the FAT size all done in the GetFATSizeSectors(), the code of which is at [1] (Rufus' version hasn...
2007 Nov 26
1
spss, string factors, selecting
...0 files with approx 100,000 records in each to analyse so manipulating data becomes a pain. Here is the code below, not sure it makes much sense without seeing the dataset:- chaff<-read.spss("/Users/Kat/Desktop/papers in progress/btopaper/ edited BTO data/fatnewchaff.sav", to.data.frame=TRUE) chafffat<-read.spss("/Users/Kat/Desktop/papers in progress/btopaper/ edited BTO data/fatmethods.sav") chaffmerge2<-merge(chaff, chafffat, by.x=c("RINGNO", "FAT", "FATMTD"), by.y=c(&qu...
2013 Nov 19
2
[PATCH] Add filesystem UUID to SYSAPPEND for FAT
Filesystem UUID shows the partition we boot kernel from. The kernel parameter has format like FSUUID=DA1A-0B2E. The SYSAPPEND bit is 0x40000. Now the FAT only supports FSUUID. The patch is based on 67aaaeeb228. Signed-off-by: Serj Kalichev <serj.kalichev at gmail.com> --- com32/include/syslinux/sysappend.h | 1 + core/fs/btrfs/btrfs.c | 3 ++- core/fs/ext2/ext2.c | 1 + core&...
2016 Feb 26
0
[PATCH 1/5] fat: fix minfatsize for large FAT32
...o purposely comment throughout the original logic. By doing it this way I am hoping to communicate my thoughts in a clearer manner (fingers crossed :). > Hi Ady, > > Your insightful post prompted me to to a little bit more digging as to > how the Ridgecrop algorithm computed its FAT size, with the result of my > investigations presented below. > > NB: For those who don't want to go through this whole part, there's a > TL;DR near the end. > > For reference, the computation of the FAT size all done in the > GetFATSizeSectors(), the code of which...
2016 Feb 25
0
[PATCH 1/5] fat: fix minfatsize for large FAT32
> Hi Ady, > > On 2016.02.25 02:08, Ady via Syslinux wrote: > > There is an "extra" sector, in comparison to... what exactly? > > Sorry if I wasn't clear. I think I implied that the Large FAT32 fat size > had an extra sector compared to minfatsize, when of course I meant the > opposite (the Large FAT32 has one less sector than the minfatsize > computed by the unpatched code, hence the check fails). The additional > sector I was talking about is from the (unpatched) minfa...
2010 Sep 09
1
Boot off FAT based ISO image?
Is there a mix of SYSLINUX and ISOLINUX that can boot an ISO image from a FAT file system? Sort of like MEMDISK but doesn't need to load the entire great-big ISO into RAM or install an int-13 driver? SYSLINUX would need to be installed on the FAT file system but it would want to chain-load ISOLINUX as installed on the ISO. ISOLINUX would load it's blocks from the...
2013 Dec 10
0
[PATCH] daemon: mkfs: Use -I option to force mkfs.fat to write a filesystem over a whole device (RHBZ#1039995).
From: "Richard W.M. Jones" <rjones@redhat.com> If you use virt-make-fs to create a partitionless FAT-formatted disk image then currently you will get an error: $ virt-make-fs --type=fat . /tmp/test.img 'mkfs' (create filesystem) operation failed. Instead of 'fat', try 'vfat' (long filenames) or 'msdos' (short filenames). mkfs: fat: /dev/sda: mkfs.fa...
2015 Apr 05
4
Is efiboot.img required?
...enough for the common user to put in > practice. How to express the embarrassing fact that ISOLINUX is not ready for UEFI but isohybrid is ? http://www.syslinux.org/wiki/index.php/Isohybrid#UEFI would need a statement like: "The SYSLINUX project cannot yet provide a FAT filesystem image which would work with the isohybrid feature. Known isohybrid ISOs for UEFI employ FAT images which contain software from bootloader projects GRUB or GRUB2." This would not help any user, of course, without a clue how to make the necessary FAT image. > stating to commo...
2013 Sep 10
0
[LLVMdev] Intel Memory Protection Extensions (and types question)
On 10 Sep 2013, at 12:13, Kostya Serebryany <kcc at google.com> wrote: > Well, ok, you can treat this as a 192-bit fat pointer, but AFAICT this is not the real intention of the MPX developers > since a fat pointer will break all ABIs, and MPX tries to preserve them. MPX is an implementation of the HardBound concept from UPenn, where this was a design goal (see also their 'low-fat pointers' work). &gt...
2015 Apr 05
4
Is efiboot.img required?
Hi, i wrote: > > Would it be desirable to explain how Fedora et.al. > > created their FAT boot images by help of old or new > > GRUB ? > > (If developers of EFI bootable ISOs are reading this, > > please give a short sketch of the procedure.) piranna at gmail.com wrote: > I did it by including the Linux kernel and the initramfs None of the ISOs i know has this st...
2020 Jan 07
3
Best way of implement a fat pointer for C
Dear All, I’m working on a project that extends C. I’m adding a new type of pointer that is a fat pointer. It has some metadata about the pointed object besides the starting address of the object. Currently I implemented this pointer as an llvm:StructType. In llvm::Type generation function llvm::Type *CodeGenTypes::ConvertType(QualType T) in the case for clang::Type::Pointer, instead of creatin...
2013 Sep 10
3
[LLVMdev] Intel Memory Protection Extensions (and types question)
...ntrast with BNDLDX / BNDSTX, > where the location is implicit. The BNDMOV instruction is also used for > stack spills of the bounds registers. This allows MPX to be used for range > checking in a similar way to the Thumb-2EE extensions. > Well, ok, you can treat this as a 192-bit fat pointer, but AFAICT this is not the real intention of the MPX developers since a fat pointer will break all ABIs, and MPX tries to preserve them. I don't think we need fat pointers to support MPX in LLVM -- it will complicate the implementation beyond necessity. (My 2c) All we need is to repres...
2015 Apr 05
4
Is efiboot.img required?
...id_ tools and > some of their internal technical characteristics, and less focused on > actual practical steps for ends users. Well, it is about really usable capabilities of isohybrid, which regrettably only work with EFI boot software from other bootloader projects. isohybrid can mark a FAT filesystem image with EFI boot software as EFI System Partition inside the ISO image. But SYSLINUX cannot provide a FAT image with EFI boot software that works with an ISO 9660 filesystem. All EFI isohybrid images known to me contain /efi/boot/bootx64.efi from GRUB Legacy or GRUB2....
2016 Mar 01
2
[PATCH 1/5] fat: fix minfatsize for large FAT32
On 02/26/16 09:54, Gene Cumm via Syslinux wrote: >> >> I'm not exactly sure how that would work (how would you mark those clusters >> as wasted when my understanding is that the FAT's can't provide any >> knowledge about them in the first place?) and unless it is automatically >> integrated and ran during the Syslinux installation, it sounds quite >> inconvenient for users. > > Total size and last-known free space should be adjusted accordingly...
2016 Feb 24
2
[PATCH 1/5] fat: fix minfatsize for large FAT32
When trying to installing Syslinux on a FAT32 drive formatted using Ridgecrop's Large FAT32 formatting tool [1], the installer will bail due to the minfatsize check, as there is an extra sector being used. This fix addresses that. [1] http://www.ridgecrop.demon.co.uk/index.htm?fat32format.htm -------------- next part ----...
2014 Jun 24
0
isohybrid has 2 variants
Hi, Ady: > -eltorito-boot EFI/BOOT/BOOTX64.EFI This is most probably wrong, as this seems to be the prescribed name for a file inside the EFI-understandable filesystem. This filesystem would not be the ISO 9660 but rather the FAT image file which serves as EFI boot image. > -eltorito-boot EFI/BOOT/BOOTX64.IMG This might be better. From where did you learn that name ? I still did not find information about how to create the FAT image. My best guess for now is to simply install enough SYSLINUX in a FAT filesys...
2014 Jul 09
5
Possible memdisk issue
...ignored by newmkfloppyimg. In particular, the output for 8203K and 8204K is different: mkdosfs -I -v -C test8203 8203 mkdosfs 3.0.12 (29 Oct 2011) test8203 has 64 heads and 32 sectors per track, logical sector size is 512, using 0xf8 media descriptor, with 16406 sectors; file system has 2 12-bit FATs and 8 sectors per cluster. FAT size is 8 sectors, and provides 2043 clusters. There are 8 reserved sectors. mkdosfs -I -v -C test8204 8204 mkdosfs 3.0.12 (29 Oct 2011) test8204 has 64 heads and 32 sectors per track, logical sector size is 512, using 0xf8 media descriptor, with 16408 sectors; file...
2011 Jul 10
3
How create a FAT filesystem on a zvol?
The `lofiadm'' man page describes how to export a file as a block device and then use `mkfs -F pcfs'' to create a FAT filesystem on it. Can''t I do the same thing by first creating a zvol and then creating a FAT filesystem on it? Nothing I''ve tried seems to work. Isn''t the zvol just another block device? -- -Gary Mills- -Unix Group- -Computer and Network Services-
2008 Jan 29
4
Resizing a fat filesystem on a USB partition
Hi All, I feel this is the most simple question but I am currently going around and round in circles and searches keep bringing me up Windows tools!! :-( I have a 512MB USB drive that has a 12MB FAT16 partition on it. How can I resize this 12MB partition to grow and fill the whole 512MB drive? Just in case I am being stupid, here is what I am doing... :-) I would like a quick USB drive that a machine can boot from but will then load and run some custom tools we have. I have done a... d...