Gabriele.vivinetto at 18:19, 12 September 2011

2011-09-12T18:19:25Z

← Older revision		Revision as of 18:19, 12 September 2011
Line 1:		Line 1:
	{{}}		{{Stub}}

	Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS.		Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS.

Gabriele.vivinetto: Created page with "{{}} Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS. * Testare se le partizioni sono allineate correttamente sudo parte…"

2011-09-12T18:19:10Z

Created page with "{{}} Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS. * Testare se le partizioni sono allineate correttamente sudo parte…"

New page

{{}}

Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS.

* Testare se le partizioni sono allineate correttamente
sudo parted /dev/mydevice align-check optimal partition-number

* in definitiva, usare
parted
per creare le partizioni, invece di fdisk o cfdisk

* In parted, è possibile sapere se una partizione è allineata con
align-check opt #numero-partizione

* Verifcare il block size (in caso di formato ADF da 4096)
cat /sys/block/sda/queue/physical_block_size

I dischi WD10EARS e WD10EADS hanno in relatà i settori da 4096 !!!!

* Lanciare fdisk con forzatura geometria, in modo da garantire l'allineamento a 4096, dosabilitare la compatibilità dos, ed usare unità di misura in settori::
sudo fdisk -H 224 -S 56 -u -c /dev/sdb

* Far partire con modo dos disativato e unità di misura in settori:
sudo fdisk -u -c /dev/sda

* Scegliere il settore iniziale come 64
sudo fdisk /dev/sda

Command (m for help): x

Expert command (m for help): b
Partition number (1-4): 1
New beginning of data (63-62926604, default 63): 64

==Riferimenti==

*[http://serverfault.com/questions/34729/how-can-i-set-the-disk-partition-alignment-using-linux-tools hard drive - How can I set the disk partition alignment using linux tools? - Server Fault]

*[http://www.ibm.com/developerworks/linux/library/l-4kb-sector-disks/index.html?ca=dgr-lnxw074KB-Disksdth-LX Linux on 4KB-sector disks: Practical advice]

*[http://www.ibm.com/developerworks/linux/library/l-4kb-sector-disks/ Linux on 4KB-sector disks: Practical advice]
*[http://community.wdc.com/t5/Desktop/Problem-with-WD-Advanced-Format-drive-in-LINUX-WD15EARS/td-p/6395/page/2 Problem with WD Advanced Format drive in LINUX (WD... - Page 2 - Western Digital Community]
*[http://myhumax.org/blog/?p=399 My Humax Blog » Advanced Format Hard Drives]
*[http://deployment.xtremeconsulting.com/2011/04/29/new-tool-advanced-format-drives/ New Tool: Advanced Format Drives « Xtreme Deployment]
*[http://answers.yahoo.com/question/index?qid=20101005104351AA5o2rA Online list of hard drive that use 4k sectors (Advanced format drives)? - Yahoo! Answers]
*[http://wdc.custhelp.com/app/answers/detail/a_id/5655/~/how-to-install-a-wd-advanced-format-drive-on-a-non-windows-operating-system How to install a WD Advanced Format Drive on a non-Windows Operating System]
*[http://forums.anandtech.com/showthread.php?t=2085685 Western Digital WD20EARS and read head parking every 8 seconds!? - AnandTech Forums]
*[https://bbs.archlinux.org/viewtopic.php?id=99626 Western Digital WD20EARS "Advanced Format" - 4k sectors needed (Page 1) / Applications & Desktop Environments / Arch Linux Forums]
*[http://www.osnews.com/story/22872/Linux_Not_Fully_Prepared_for_4096-Byte_Sector_Hard_Drives Linux Not Fully Prepared for 4096-Byte Sector Hard Drives]
*[http://b1mmer.com/linux/wdhdd/ Fix for slow performance of WD15EARS WD10EARS WD20EARS | Konstantine's blog room]
*[http://www.hv23.net/2010/02/wd10ears-performance-larger-block-size-issues4k/ WD10EARS performance (larger block size issues/4K) – Jörns Blog]
*[http://community.wdc.com/t5/Desktop/Problem-with-WD-Advanced-Format-drive-in-LINUX-WD15EARS/m-p/7573#M369 Re: Problem with WD Advanced Format drive in LINUX... - Western Digital Community]
*[http://ubuntuforums.org/showthread.php?t=1753797 [ubuntu] Advanced Sector Warning using WD10EADS? - Ubuntu Forums]
*[http://linuxconfig.org/linux-wd-ears-advanced-format Linux WD EARS Advanced Hard Drive Format]
*[http://www.tablix.org/~avian/blog/archives/2010/07/partition_alignment_tester/ Avian’s Blog: Partition alignment tester]
*[http://ldn.linuxfoundation.org/blog-entry/aligning-filesystems-ssd%E2%80%99s-erase-block-size Aligning Filesystems to an SSD’s Erase Block Size | Linux Developer Network]
*[http://ben.goodacre.name/tech/Disk_Partition_alignment_%28Linux%29 Disk Partition alignment (Linux) - ben.goodacre.name/tech]
*[https://ata.wiki.kernel.org/index.php/ATA_4_KiB_sector_issues ATA 4 KiB sector issues - ata Wiki]
*[http://bartsjerps.wordpress.com/2011/02/22/disk-alignment-linux/ How to set disk alignment in Linux « Dirty Cache]
*[http://www.dark.ca/2009/06/22/force-disk-geometry-with-sfdisk/ force disk geometry with sfdisk « dan's linux blog]

Partizionare correttamente hard disk in Linux - Revision history

Gabriele.vivinetto at 18:19, 12 September 2011

Gabriele.vivinetto: Created page with "{{}} Importante in particolare per hard disk con sector size di 4k, tipo il WD10EARS o WD15 EARS o WD20EARS. * Testare se le partizioni sono allineate correttamente sudo parte…"