2013年4月6日星期六
about Elephant Drive
ElephantDrive is a storage virtualization service used primarily as an online backup tool, but also as a remote access service/collaboration tool. The service runs on both Windows and Mac platforms, and allows users to create simple automated rules for protecting data by moving it into an ElephantDrive account.
ElephantDrive makes use of infrastructure-on-demand as part of its architecture, and is one of the first and most popular examples of the applications built onAmazon's S3 (Simple Storage Service). ElephantDrive initially utilized Amazon S3 as a tool for a datacenter migration, but quickly moved it into the production infrastructure.Architecture
ElephantDrive's first major breakthrough came in conjunction with the 2008 closing of early cloud storage provider and AOL property Xdrive when the service offered a free tool for migrating files off of the Xdrive platform, simplifying the process of switching providers.
The company then turned its focus to the Network Attached Storage (NAS) space, designing and deploying cloud storage optimized to run natively on NAS devices in a series of partnerships with the hardware makers themselves. The initial partnership was with NETGEAR's storage product line of ReadyNAS systems in the form of a co-branded embedded cloud backup service called the "ReadyNAS Vault." Additional cloud storage for NAS integration were launched with hardware makers QNAP and Thecus, both of which opted to use the ElephantDrive brand, as opposed to "Vault" co-branding.
ElephantDrive's first major breakthrough came in conjunction with the 2008 closing of early cloud storage provider and AOL property Xdrive when the service offered a free tool for migrating files off of the Xdrive platform, simplifying the process of switching providers.
The company then turned its focus to the Network Attached Storage (NAS) space, designing and deploying cloud storage optimized to run natively on NAS devices in a series of partnerships with the hardware makers themselves. The initial partnership was with NETGEAR's storage product line of ReadyNAS systems in the form of a co-branded embedded cloud backup service called the "ReadyNAS Vault." Additional cloud storage for NAS integration were launched with hardware makers QNAP and Thecus, both of which opted to use the ElephantDrive brand, as opposed to "Vault" co-branding.
标签： ElephantDrive, NAS, Thecus
2012年7月7日星期六
优秀的免费Linux RADIUS服务器 zz
RADIUS是一个工作在应用层的客户端/服务器协议，采用UDP协议传输。在通信行业，远程访问服务器（Remote Access Server RAS）、虚拟专用网络服务器、基于端口验证的网络交换机和网络接入服务器（NAS）都是控制网络接入的网关，它们都有一个RADIUS客户端模块可以和RADIUS服务器通信。起初，RADIUS协议采用1645和1646端口分别用作认证和记账，RADIUS服务器上运行的授权子进程不需要通讯端口。后来Internet号码分配机构（Internet Assigned Numbers Authority IANA）为RADIUS协议分配了1812和1813端口，成为了现在RADIUS服务器的默认端口(中文)。
2011年9月26日星期一
Thecus N5200Pro 阵列配置相关
1、Master Raid：
In a multiple RAID configuration, one RAID volume must be designated as the Master RAID volume. The Master RAID volume will store all installed modules. If the Master RAID is changed to another location (i.e. assigning HDD 2 to be the Master RAID volume after HDD 1 had been previously assigned), then all modules must be reinstalled. In addition, all system folders that were contained on the Master RAID volume will be invisible. Reassigning this volume to be the Master RAID will make these folders visible again.
在多RAID配置中，其中一个Raid必须被指定为Master RAID，主Raid上存储所有的安装模块，如果主阵列改变位置（如在HDD1加入主阵列后HDD2也被加入主阵列），所有模块必须重新安装，除此之外，所有主阵列上的系统文件夹将变的不可见，重新指派该卷为主阵列才会使这些文件夹重新可见。
Thecus N5200Pro 硬盘故障
登录至Thecus N5200Pro web管理界面，在storage->Disk下发现有一个磁盘状态为Warning
点击“Warning”，如下图
发现Reallocated Sector Count不为0,而其他几块正常工作磁盘此项均为0，用户手册给出如下解释：
当状态显示警告时,通常意味着硬盘上有坏区。这仅仅以一条警告的形式出现,你应该考虑改变这个驱动器了。
Reallocated Sector Count：又名重置扇区计数，当硬盘驱动器找到一个读/写/校验错误,这标志着这个扇区作为“重置的”并传输数据到一个特别的保存区(预备区)。这个过程也被认为是重映射;“再分配的”扇区被叫做重映射。 这就是为什么,在现代硬盘上,你看不到“不良扇区”,而当测试表 面时,---所有的坏区隐藏在重置扇区里。但是,更多扇区被重置, 更加可以注意到磁盘读/写速度的降低。(直到10%或者更多)
看样子要更换硬盘了！
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