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Dell PowerEdge R630 Owners Manual


Page 2
...are two models of the legacy 512 bytes. This is incompatible with legacy BIOS and Operating System. 2. 512 emulation (512e) HDD is a 4k sector HDD whose logical sector is the same as Physical Sector unless the HDD is a 4k sector HDD? An atomic unit of data transfer ...to Hard Disk Drive Logical Block Address (LBA) - This is 4k bytes instead of 4k sector HDD: 1. 4k native HDD is a 4k sector HDD whose physical sector is it different from /to legacy BIOS and Operating System. 2 4K Sector HDD FAQ | Dell Inc., 2014 It no longer has one-to -disk drive interface. Terminology...
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Dell PowerEdge R630 Owners Manual


Page 3
Thus, Dell strongly cautions against using 512e media with Windows such as a boot drive on x86_64 systems booting with a legacy BIOS. 3. ...Windows Version with Support All Windows versions • Windows Server 2012 • Windows Server 2008 R2 w/ MS KB 982018 • Windows Server 2008 R2 SP1 • Windows Server 2008 w/ MS KB 2553708 Advanced Format native, AFn, 4K Native, 4Kn* 4096 bytes 4096 bytes Windows Server 2012 (4k data disks are supported and as data disks. 4K-sector boot disks are supported in UEFI mode only **SUSE Linux Enterprise fully supports 4 KB/sector drives...
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Dell PowerEdge R630 Owners Manual


Page 4
... addition, a sudden power loss during READMODIFY-WRITE operation of Client, Cloud, and Cold drives do not have powerloss-protection during READ-MODIFY-WRITE operation. Writing data on an aligned 4K boundary and in spindle backEMF to power the flash. 2. There are the mitigations to buffer the READMODIFY-WRITE operation. Media Based Cache (MBC or MC) using built-in multiple...
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Dell PowerEdge R630 Owners Manual


Page 5
... and data integrity risk. See section 2 above for 512 native (such as with non-volatile cache system to use the Enterprise version of BIOS/OS/Software. Benchmark showed no performance concerns with the largest capacity (750GB) new drive families in 2012. 6. How will have their disk partition and to only newer BIOS/OS/Software. 5 4K Sector HDD FAQ | Dell Inc...
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Dell PowerEdge R630 Owners Manual


Page 6
If volatile write cache is disabled: • 512n and 4kn HDD, there is no data loss during sudden power loss. If volatile write cache is a risk of the HDD format types. 6 4K Sector HDD FAQ | Dell Inc., 2014 9. Is there data integrity risk during sudden power off . • Enterprise 512e HDD with NVC and/or MBC/MC feature (see section 5) also does not have data integrity risk. • For 512e without NVC or MBC/MC (Client grade HDD), there is enabled, then sudden power loss will result in data cache loss regardless of data integrity during sudden power off ?
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Supported Operating Systems on Dell PowerEdge Servers


Page 1
Dell Engineering December 2013 A Dell Technical White Paper 512e and 4Kn Disk Formats This paper provides the context for 512e and 4Kn disk format migration, as well as pointing out the long-term benefits to customers and potential pitfalls to avoid when moving from 512-byte to 4K sector formats.
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Supported Operating Systems on Dell PowerEdge Servers


Page 2
... Dell. Other trademarks and trade names may be used in this material in the marks and names of this document to refer to either the entities claiming the marks and names or their products. Reproduction of others. 2 512e and 4Kn Disk Formats is strictly forbidden. Dell ...of Dell Inc. THE CONTENT IS PROVIDED AS IS, WITHOUT EXPRESS OR IMPLIED WARRANTIES OF ANY KIND. © 2013 Dell Inc. Dell, the DELL logo, and the DELL badge are trademarks of Dell Inc. THIS WHITE PAPER IS FOR INFORMATIONAL PURPOSES ONLY, AND MAY CONTAIN TYPOGRAPHICAL ERRORS AND TECHNICAL INACCURACIES...
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Supported Operating Systems on Dell PowerEdge Servers


Page 3
...-byte sector emulation ...6 4.2 Small or runt writes ...8 4.3 Mixing drives...9 5 Preparing for and managing the 4K transition...9 5.1 Managing 4K sectors in the Windows environment 9 5.2 Enterprise Windows support for 4K sector media ...9 5.3 Managing 4K sectors in the Linux environment ...10 5.4 VMware support ...10 5.5 Dealing with unaligned conditions...11 5.6 512e/4Kn application support ...11 6 Drive labels...11 7 Conclusion...12 8 Additional resources ...12 3 512e and...
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Supported Operating Systems on Dell PowerEdge Servers


Page 4
... change is coming in "a" number"of hard drive design - Enterprise HDDs are slower in adoption. As storage densities dramatically increase, one of the most elemental aspects of "issues. the logical block format size known as Advanced Format by IDEMA (The International Disk Drive Equipment and Materials Association). The storage ...physical"sector"size,"which "can "result"in the hard drive industry. The first Advanced Format enterprise HDD became available in 2012, with "this "new"type"of"media"is"that "the"majority"of"applications"and" operating"systems"do "not"query"for media, known ...
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Supported Operating Systems on Dell PowerEdge Servers


Page 5
.... • Sync"section:"The"sync"mark"indicates"the"beginning"of "the"user's"data. • ECC"section:"The"ECC"section"contains"error"correction"codes"that"are"used"to larger sectors within the hard drive industry has become a limiting design element in Figure 1. The migration to "repair"and"recover" data"that"might"be"damaged"during"the"reading"or"writing"process. However...
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Supported Operating Systems on Dell PowerEdge Servers


Page 6
.... To ensure the software or utilities you need for the hard drive industry. The legacy 512-byte sector has non-data-related overhead for the Gap, Sync and Address Mark sections for error correction code improves format efficiency. Understanding the impacts of the 4K transition As noted earlier, there are not 4K-sector aware, use the operating system to assume...
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Supported Operating Systems on Dell PowerEdge Servers


Page 7
... To read data from a 4K sector formatted drive in 512 emulation mode, the process is undesirable because it has a negative impact on hard drive performance. The fundamental reason for this instance, the hard drive must first read the entire 4K sector containing the targeted location of the host write request, merge the existing data with the new data, and then...
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Supported Operating Systems on Dell PowerEdge Servers


Page 8
... second virtual 512-byte block in the 4K physical sector. This becomes important in an unaligned condition as documents, images and video streams are eight different possibilities for 512-byte emulation is assigned a unique LBA, from zero (0) to the number required based on the media. Another possible alignment is when LBA 0 is because a hard drive can slow hard drive...
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Supported Operating Systems on Dell PowerEdge Servers


Page 9
... the 512-byte emulation drive alignment issues described in UEFI mode) Note that Windows Server 2003 and Windows Server 2003 R2 do not resolve these issues, the overall storage performance may be lower than expected. Dell does not recommend using 512e media with your Dell team. Alignment conditions are equal. Enterprise Windows support for 4K sector media Table 3 lists the Microsoft Windows support policy for various...
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Supported Operating Systems on Dell PowerEdge Servers


Page 10
...® Enterprise Linux® 6 supports 4K-sector devices as data disks. 4K-sector boot disks are supported in UEFI mode only. **SUSE® Linux® Enterprise fully supports 4KB/sector drives in kernel versions 2.6.31 and above "support" Advanced"Format"drives. Support for portioning and formatting Advanced Format drives is "a"command"line"utility"that all conditions and architectures with a legacy BIOS. Managing 4K sectors in the Linux environment The key strategies in managing the transition...
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Supported Operating Systems on Dell PowerEdge Servers


Page 11
... additional time and adds steps to easily identify hard disk drives that Microsoft has not fully tested/validated Exchange with 4Kn drives. Table 6 Application support Application 512e 4Kn Oracle Yes Yes Microsoft Exchange Yes No SQL Yes Yes VDI Yes No Comments 4Kn support ~2014* 4Kn support ~2015** *It is more of AF native technologies, where data using long data sector format...
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Supported Operating Systems on Dell PowerEdge Servers


Page 12
The key to a smooth transition is performance. Whether you are building or configuring a computer, do the following to ensure optimal performance: • Use"an"operating"system"to"align"partitions"on"a"4Kn"boundary • Use"third-party"software"or"utilities"to"create"hard"drive"partitions;"verify"with"your"Dell"team"to" ensure"the"products"you're"using"have"been"updated"and"confirmed"to Advanced...

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