Questions tagged [sectors]

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How can I check the cluster size (allocation unit size) of an exFat partition on Windows?

I want to reformat an exFAT USB drive with the same allocation size as the current factory exFAT partition, so when it ask me for allocation size, I don't know what to answer: Thus the question: How ...
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1 vote
1 answer
28 views

What is the difference between allocation unit size and sector size?

I have been given the following disk recommendation: The disk drives should have standard native sector sizes of 512 bytes and 4 KB. Hard disks with sector sizes larger than 4 KB may cause errors ...
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1 answer
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Searching for strings in a dd image, extracting data from it

I am trying to recover the contents of a text file that became corrupt following a power outage. The file size is still correct (14 MB), but the text in the lower half of it has been replaced by ...
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1 vote
1 answer
37 views

Request to allow restoration of HDD sectors image

I took apart my Creative Nomad Zen Xtra and opened the HDD up in HXD.exe then saved all the sectors to my d: drive so I could use the HDD for something else temporarily but then I realized I need ...
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Why is my physical sector size is different than the logical sector size? [duplicate]

I used fsutil in windows to find out the sector info about my volumes. I have two hard disk one is SSD while the other one is typical magnetic tape hard disk. The SSD drive volume C have both logical ...
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0 votes
1 answer
83 views

Is the sector size showed by winhex just an emulation from advanced format?

The info below is from a hard drive, given these two lines; Bytes Per Sector : 512 and Bytes Per Physical Sector : 4096 i conclude that it has an advanced format emulating a sector size of 512 bytes ...
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1 vote
1 answer
116 views

Is it possible to EDIT/REMOVE the first sectors of a SDD/HDD?

Read This for the full story: BitLocker Recovery Key Isn't working ( Corrupted Maybe ? ) the drive isn't encrypted yet I mentioned that in my older post, and it appears to be correct the drive isn't ...
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1 answer
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Aligning partitions to 4k boundaries results in 512b free space at beginning of drive

I'm partitioning a disk for FreeBSD installation. I create my partitions/slices: gpart create -s mbr ada0 gpart add -t freebsd -s 1G ada0 gpart add -t freebsd ada0 gpart create -s bsd ada0s1 Now I ...
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4 votes
3 answers
2k views

How to convert the Western Digital "Ultrastar® DC HC530 14TB HDD" from 512e to 4Kn sector size? (In Windows 10)

Background The Western Digital "Ultrastar® DC HC530 14TB HDD" (Model number: WUH721414ALE6L4)(SATA Interface) comes only in a 512e sector size by default. According to the 2 Western Digital ...
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1 vote
1 answer
300 views

What's the difference between sector interleave and sector skew, and are both ever used on the same disk?

In reading about the geometries and layouts of different disks and filesystems in various OSes, or at least floppies from the late '70s through the mid '90s where I was focusing, I noticed the terms &...
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1 answer
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Is a sector number determined forever?

If 'alpha' was a physical place on HDD occupying 1000th sector once, is 'alpha' a place on HDD occupyig 1000th sector forever? Forever means regardless of 'got bad sectors, low format, reset S.M.A....
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2 answers
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Why the term 'bad bit' not used?

Since a sector is composed of some (512 or 4096) byets, it looks natural to consider the term 'bad bit' rather than 'bad sector'. But the term is not used. There are plenty of HDD error checking ...
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2 answers
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Signal of HDD platter to controller [closed]

HDD heads read the surface of HDD, giving a signal to the controller: For a single signal, is it about one bit, one sector, or something else? If it is one bit, how many kinds of signals are there? ...
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1 answer
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I Think I'm Due For A New HD (reallocated sectors)

My computer has been running crazy slow for quite awhile..I've done all the normal fixes I could dig up and even did a complete factory reset of the computer Things were running better and now they ...
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1 vote
3 answers
206 views

Is it possible to remove sectors from a disk?

My question is a simple one, I think, but I could not find an answer on the internet (2h search time...): I want to remove to concept of sectors from one of my hdds? If you think, this question is ...
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2 votes
1 answer
528 views

Determine sector-size of a drive

I know usually the sector size is 512 B but some drives use 4 KiB (advanced format). How can I check which one is used by a drive? Is the sector size somewhere stored on the drive - e.g. in the MBR ...
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0 votes
1 answer
315 views

What is the "write page" size of a WDS200T2B0A/WDS200T2B0B?

Does anyone know the write page¹ size of a Western Digital Blue SATA SSD (model numbers WDS200T2B0A or WDS200T2B0B)? I contacted WD support and they're claiming it is 512B, but most information I've ...
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Is it possible to fix number of sectors in the USB enclosure?

I have a LUKS-encrypted external USB hard drive (1TB HGST Touro S). If I put the drive into the new USB enclosure, it reduces the number of sectors by 1 and I cannot mount the filesystem anymore. Is ...
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1 vote
0 answers
173 views

How to spot or match the specific sector of the DVD disc in the movie?

I've been checking the condition of DVD discs with VSO Inspector. Most of time, it doesn't show any errors on the discs. However, when there's an error on a disc, sometimes it shows that there's an ...
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1 vote
3 answers
468 views

Why the different arc length sector have the same size data capacity?

The sector-A and sector-B, the arc length are different, but they representing data capacity are same, such as 512KB. you see, whether the different cylinder sector's density is different? and if we ...
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1 answer
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Converting Logical sector to CHS tuple on an SSD

I'm getting myself used to x86 assembly, so I figured I'd start with some 16-bit programs. To test myself, I'm creating a program that will load data off a disk, copy it to memory, and then use it for ...
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22 votes
2 answers
90k views

GPT PMBR Size Mismatch will be corrected by w(rite)

Linux gives error "GPT PMBR size mismatch will be corrected by w(rite)." The error message is far from self-explanatory. Does this mean that Linux will (attempt to) resize the GPT partition ...
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1 vote
1 answer
727 views

Reading a file using LBA addressing

Is it possible to read/execute files/programs using the LBA addressing rather than the file system location? For example can I execute /bin/sh using the LBA sector locations of it obtained using ...
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-1 votes
1 answer
4k views

How do I determine what is the best block size for a 960 PRO M.2?

I have a Samsung NVMe SSD 960 PRO M.2. I was in the process of installing Gentoo on it. gparted notified me that the physical block size, is different than what the kernel reports. I thought the ...
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0 votes
1 answer
1k views

Block defective RAM sectors [duplicate]

How do I find defective RAM sectors and where? I have tried memtest, but where it does describe the sectors (if). And how to solve them exactly. First, i have tried this : https://thecomputerperson....
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4 votes
0 answers
2k views

Bad sectors in RAM, fixed or not?

So I have blocked some bad memory range from RAM memory. My Question is the next one, I have done it right? Here you have the info: C:\Windows\system32>bcdedit /set badmemorylist 0xFC 0xFD 0xFE ...
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1 vote
3 answers
2k views

Is it possible for the filesystem's logical block size to be less than the physical sector size?

Let's say we have a block device (eg. Hard Drive) with 4096 bytes sector size and no 512 bytes emulation is available (The hard drive only understands units of 4096 bytes size). Is is possible to ...
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0 votes
1 answer
111 views

What actually happens with the hard drive when we resize(shrink, extend) partitions?

I have a hard drive with 4 partitions(c,d,e,f) and I want to shrink partition (e) and then extend partition (c) with the shrunk free space. What will happen with the hard drive? Will the Cylinders/...
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1 vote
0 answers
119 views

Do new USB flash drives use advanced format (AF)?

I just want to know if that new feature (AF - advanced format) on some hard drives, is present on flash (USB external disk) drives as well. I'm a little bit confused because a simple check on /dev/...
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2 votes
1 answer
9k views

What is a valid block size in a disk?

Let be a disk with the following characteristics : bytes per sector = 512 sectors per track = 50 tracks per surface = 2000 number of platters = 5 average rotational speed =5400 rpm average seek time =...
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1 vote
0 answers
338 views

Is it possible to find out which sectors are pending without full disk read?

I want to get a list of sectors that are reported as pending in the S.M.A.R.T. value 197 (С5) Current Pending Sector Count. Any chance to get it without resorting to a full surface scan?
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1 vote
0 answers
567 views

Remapping bad sectors from sectors not in the spare sector pool

For common flash controllers what happens when the spare-sector pool runs out and a bad-sector is found? Will a flash controller (any form factor) remap failing sectors to non-allocated sectors in the ...
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9 votes
1 answer
17k views

What is the difference between a disk block and a sector?

I know that a sector is the unit in which a track is splitted, but I had this doubt since I was looking for information about the maximum number of pointers that an inode can support. I found that ...
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3 votes
2 answers
2k views

File slack / RAM slack: why does Windows write arbitrary RAM bytes to disk? Does Linux too?

I just read about file slack in a book about Windows 7. What I already (think to) know: Windows stores data on the disk in clusters. A cluster usually contains 8 sectors of 512 bytes each, so 4096 ...
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0 votes
1 answer
2k views

How can I calculate what sector of the partition an offset resides in?

I have an offset (1519748) and I want to calculate which sector of the partion (1) that the offset resides in. How would I calculate this?
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3 votes
1 answer
2k views

How to read MFT on USB Hard Drive (NTFS, 1TB)?

I'm looking for a high-level method to read the MFT entries on an NTFS file system for a Seagate 1TB internal hard drive. The platform is Windows 7. I need to fetch the filename, block size and ...
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0 votes
0 answers
258 views

Emulate 512-byte sectors with Xen

Anyone know how to make Xen 6.2 emulate 512-byte sectors when exposing a drive to a virtual guest? This would allow exposing native 4kB sector drives to older virtual guests like Windows 2003/2008 ...
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2 votes
0 answers
639 views

Getting a 4TB USB drive (4k native sector size) to work with Xen and Windows 2008 guest

I am trying to get a new 4TB Seagate USB drive to work with Xen 6.2 and a Windows 2008 R2 virtual guest. The Xen host sees the drive fine, fdisk -l lists it with the correct capacity, etc. I can ...
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0 votes
1 answer
229 views

Wiping only part of a partition on an HDD

I have an HDD which has failed in my NAS, and which I want to return to the manufacturer. I want to remove the data first since I had not encrypted the drive. The drive is recognized by Windows and ...
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1 answer
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Is the beginning file on a SATA HDD the same as an SSD? [closed]

Having a hard time finding the answer to this. The beginning sector for standard user data on a HDD (sata, scsi, or ide) is always the same. First question: Which sector is it? Second question: ...
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1 vote
1 answer
2k views

Cloning a 512 sector size to Advanced Format WD Black drive

I have a old WD Black drive that is not Advanced Format. Due to it having one bad sector in a unused area I need to clone it to a new hard drive to avoid losing data. Unfortunately the same model of ...
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2 answers
708 views

Partition Hard disk with start sector 1

I have a new Hard Disk which I want to use for NAS drive. The requirement is that the partition as seen in fdisk should be as below. Device Boot Start End Blocks Id System /...
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9 votes
1 answer
2k views

What are the differences between Host Protected Area (HPA), Device Configuration Overlay (DCO), and service area of a HDD/SSD?

I'm confused about the differences between the Host Protected Area (HPA), Device Configuration Overlay (DCO), and the service area of a HDD or SSD. From what I gather on the wiki pages, disks can have ...
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1 vote
0 answers
1k views

Can a USB pen drive have sector size > 512 bytes?

Hard-disks, these days, can have sectors sized from 512 to 4096 bytes. I would like to know if the same is also possible with USB removable storage media (flash drives, or pen drives). Context: I ...
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1 answer
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Unable to access 15 GB partition?

I have 250 GB HDD. I have created 5 partitions of it. Unfortunately, I am unable to format, delete, access my 5th partition which is of 15 GB. It says that it is Unallocated. If it is unallocated then ...
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1 vote
1 answer
74 views

Recover Bootable USB disk data

I have a bootable USB disk. There is a program in the USB disk for controlling a micro-controller. Yesterday my friend did a big mistake. He connected the disk to his laptop, and after creating backup ...
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10 votes
2 answers
5k views

Unable to Write Zeros to Bad Sectors/Hard Disk Not Counting Reallocated Sectors

I have a drive that is reporting that the current pending sectors is "45". I have used badblocks to identify the sectors and I have been trying to write zeros to them with dd. From what I understand, ...
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15 votes
1 answer
2k views

Can prematurely powering down a computer cause bad sectors in a hard drive?

Q1: Can forcibly powering off a PC without using the built-in shutdown/reboot functions, cause a HDD to accumulate bad sectors? Whether it be the result of BSODs, lockups, crashes, etc. Q2: If so, ...
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1 answer
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Partitioning an SSD with sfdisk

I have been trying to partition this SSD (Samsung 840) nicely for a while now. I want to make sure the pages line up with the SSD pages to limit the amount of writes. I found this site which ...
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  • 499
2 votes
1 answer
2k views

Linux command to get FAT32 sectors of a file

I'd like to find an equivalent command to debugfs but for FAT32 partitions within Linux. I need to list all the sectors corresponding to a specific file (I'm working on a disk imaged with dd). If ...
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