Upcoming Industry Conferences
Streaming Forum CONNECT [19 August 2020]
Content Delivery Summit [5 October 2020]
Streaming Media West CONNECT [6-7 October 2020]
Past Conferences
Streaming Media East CONNECT [2-3 June 2020]
Content Delivery Summit [1 June 2020]
Streaming Media West [19-20 Nov 2019]
Esport & Sports Streaming Summit [19-20 Nov 2019]
OTT Leadership Summit [19-20 Nov 2019]
Video Engineering Summit [19-20 Nov 2019]
Live Streaming Summit [19 Nov 2019]

StreamingMediaGlobal.com: Industry Announcements
View Press Releases
Add Your Press Release
StreamingMediaGlobal.com provides this section as a service to its readers and customers.


Press releases are subject to approval by the editorial staff of StreamingMediaGlobal.com and may be edited or altered for length and clarity, or to remove unsubstantiated and unverifiable claims.


All content presented within the press release section is that of the submitter. StreamingMediaGlobal.com does not necessarily endorse such content and bears no responsibility or liability for its accuracy.

RAIDIX Storage Software Provides New Solution for Silent Data Corruption

RAIDIX software pioneers a new approach to solving silent data corruptions for media professionals.
St. Petersburg, Russia(7/29/2014) -

RAIDIX Storage Software Provides New Solution for Silent Data Corruption

Today’s media and entertainment industry depends on highly accessible and reliable content. Any interruptions in workflow can delay project delivery times, pulling valuable resources from more productive uses. With potentially catastrophic consequences, silent data corruption is one of the most serious IT challenges facing modern media professionals. Though previous solutions address aspects of dealing with silent data corruption, they are incomplete and often degrade performance. RAIDIX storage software has pioneered a new solution to detect and correct silent data corruption, while retaining high-performance storage standards.   

What is Silent Data Corruption?

Silent data errors are caused by bugs in drivers and disk firmware, memory errors, drive-head crashes, as well as similar software and hardware problems. Silent errors that occur during the write to disk process are the most dangerous, as there is no indication that the data is incorrect.

Silent errors go undetected by drive firmware and host operating systems. No matter what a “regular” system does, silent errors and their corresponding data corruptions will not be detected, unless they result in data structure corruption, which is verified for integrity by the system or application software. For example, a silent error in a file system table will likely be detected at a point when the host OS will be unable to locate files or their fragments, or the database server will notice a malformed table caused by a corruption of information keeping the table structures.

As drive capacity continuously increases, silent data corruptions are becoming more prevalent. Multiple independent studies have shown corruption rates starting at one error for every 67 GB to much higher rates. In short, silent data corruption is a pressing reality in the large capacity storage environment.

Approaches to Combat Silent Data Corruption

Combating data corruptions has long been a high-priority concern of computer hardware and software manufacturers. A variety of preventative methods exist. For example, some errors are detected using checksum functions stored in each drive sector. When disk operations generate plural errors within a single sector, drives may copy the information to a reserve sector and remap the failing sector for a healthy one, without assistance from Operating System (OS) software. The following approaches are commonly used by hardware and software vendors to detect and, if possible, to correct silent data errors.

Adding checksum information to each block

This method works best with select SAS drives, allowing disks with larger than standard sector size. Checksums, stored next to each data-block, are used during read operations to detect a possible corruption. This approach reduces the formattable disk volume, but has relatively low impact on performance.

Most drives support only the default sector size, so checksums have to be stored in a different sector. Since additional sector reads are constantly required, checksuming will severely degrade performance, in addition to taking up disk capacity.

Write-ReRead

After each write, the sector is read back and checksumed. The checksums of the data block before and after the write are compared to verify that the data was written correctly.

RAID systems can employ two additional instruments for silent error detection:

Vertical-parity

 In addition to stripping data and parity information, secondary parity records block checksums written on each drive in the array. This vertical parity strip is used for detecting data corruptions.

Using Q redundancy of RAID-level 6 arrays to detect corruptions

RAID6 arrays use a scheme called P+Q redundancy. It utilizes Reed-Solomon codes to protect against up to two disk failures. Q checksum can be used to verify data integrity and to detect data corruptions.

Sun/Oracle’s ZFS file system was designed to combat data corruptions by storing redundancy information on multiple levels. RAIDIX’s forward error-correction algorithm analyzes RAID metadata to detect and fix silent corruptions, while regular disk operations are performed, without performance degradation. In addition, RAIDIX performs background scans for silent errors during lower-activity periods. Unlike ZFS’s process of tying information protecting data from corruptions to the proprietary file system structures, RAIDIX implements error correction at the block level, rendering compatibility with any OS and the file system chosen by the platform’s administrator.

RAIDIX’s unique algorithm, developed through properties of RAID6 checksums, effectively detects and corrects silent data corruptions. Since RAIDIX does not need additional storage and/or read operations, using only standard RAID properties, it exhibits performance far exceeding competing approaches.

For More information

RAIDIX Media Storage Software – http://www.raidixstorage.com

RAIDIX Sales - +7.812.622.1680

Join us on Twitter @RaidixSoftware

RAIDIX
Editorial Contact:
Alec Albright
+7 (812) 622-16-80
albrayt.a@raidixstorage.com