Follow Slashdot stories on Twitter


Forgot your password?
Compare cell phone plans using Wirefly's innovative plan comparison tool ×

Comment Re:Come the fuck on (Score 1) 338

> Btrfs is a lot more flexible about expanding the filesystem, especially in mirror mode.

--Yah, most of the confusion about expanding ZFS filesystems OTF stems from RAIDZ. You *can* expand RAIDZ, but if you want your I/O to stay "sane" you need to duplicate the configuration to another vdev and add it to the pool. E.G. you have a RAIDZ of 5x1TB disks, you kinda need to create another vdev of 5x1TB disks and add that to the pool, or else it won't be balanced right.

--Expanding a *mirrored* ZFS pool however, is dead easy. You can start with a single disk, add a mirror to it, wait for resilver, and then add another set of (same-size/brand) disks to make it zRAID10. Then add another similar-hardware set of mirrored disks whenever you need to expand. ZFS also makes it easy to replace disks in-place AND will "see" the extra space every time you complete a mirror "column" (2 disks in the same set) if you set the pool properties right (autoexpand=on, autoreplace=on). You can also do triple mirroring, which I would definitely recommend if you have 8TB+ disks.

--So who cares if you lose 1/2 your disk space with RAID10, I would argue that with anything 1TB+ you *need* that real-time mirror - and disk prices have come down, you can get a 2TB NAS drive for under $90 these days. RAIDZ rebuild times (at least on Linux) are reported to potentially be extremely long since they haven't worked on the "speed" part of ZFS yet; rebuilding a RAID10 column/mirror is orders of magnitude faster since it doesn't have to replay every transaction or do a bunch of calculations.

--Took me a while to do the research on Linux+ZFS, but if you implement it correctly you can get a *lot* of benefits. ;-)

Comment Re:Yes, because optical is READ ONLY. (Score 1) 379

--I bought that exact drive (Kanguru 16GB USB3 with write-protect switch) and it has been a *great* little drive. Very fast read speeds; I mostly use it for client-PC troubleshooting and carry around all my utility software on it. Handy if you're not sure a client's PC might be infected, and more space than a standard DVD. A tad pricy, but well worth it.

Comment Re:USB to sata dongle plus 2TB SSD (Score 2) 338

--Umm, you do realize that SSDs are:

a) WAY expensive for backing things up to, and

b) An un-powered SSD drive will eventually degrade and LOSE ITS DATA in a fairly short amount of time (for Backup purposes)? This gets worse with Triple-level-and-up (TLC) Cell structures, BTW. They basically need an electric refresh to keep the cell structure from flipping to another position.

--Depending on the temperature/humidity it's stored in, SSD degradation could be detected in as low as several months or - if you're lucky - possibly as much as a couple of years. But if you don't fire it up every so often and run a data-consistency check, how would you know if your files are succumbing to bit-rot?

--There are many, many more options for backups that don't cost *nearly* as much as SSDs - that's not really what they're intended for. I can see buying an SSD if you want faster startup times on your PC, are into gaming, or you do a lot of virtualization suspending/resuming (R/W multiple gigabytes) every day. SSD's are designed to be faster than spinning disks, NOT necessarily long-lasting without power.

--For now, it looks like the best thing to do is keep your data online, have multiple rotating backups, store some stuff off-site, and copy data from old-drive to new-drive before it breaks. (I would even say real-time Mirroring or RAIDing is getting to be essential for any disk over 1-2TB.) But if you're storing your main backups on SSD media, you're over-spending *and* may be risking data loss if you don't power up the drive every so often.

--JMHO, but I would look into something like M-DISC for reasonable amounts of long-term archival storage. 4.7GB DVD M-Discs were made to the highest standard; 51% sure about the 25GB Blu-Ray M-Discs, not sure about the 100GB BD-R multi-layer discs. (Cloud backup is OK I guess as long as you don't mind 3-letter-agency snooping and you don't have a slow Internet with data caps, but encryption is definitely recommended before uploading.)


Comment Re:DVDs (Score 1) 338

--It's not very popular these days, but you could buy a Blu-Ray M-disc burner and a pack of 16x25GB M-Disc Blu-Rays for archival storage(think "stone media") for under $180, and burn ~375GB (uncompressed) onto 16 Blu-Ray DVDs...

--Actually I just checked and it looks like you can now buy 100GB M-disc blu-rays, albeit for a higher cost (and it may not be the same reliable stone-based media with scratch-resistant coating, according to 1 review I read.)

--About a year ago, I did a serious appraisal of all the data I *really* had to put under a "NEVERLOSE" label; and across all my PCs and laptops, it was under 25GB. Most of that was my CD music rips collection. You don't have to keep EVERYthing if you prioritize a little. Most of the other stuff is VMs and copies of things that are available on $something-else in the house.

Comment Re:Come the fuck on (Score 1) 338

--Best answer I've seen so far, except for the ZFS responses.

--My question is, how has Synology gotten btrfs to be "stable" when it's still considered to be "experimental" on a regular Linux distro? I've seen reports of people losing all their data on btrfs and still consider it to be at *least* 3-5 years behind ZFS.

Submission + - Why are GitHub and censoring content? (

Miche67 writes: The internet is known for the free and rapid dissemination of uncensored information, but lately sites and services have been censoring content--including GitHub and

Bryan Lunduke says: "GitHub, a service primarily used for open source and free culture projects, recently censored a repository that contained information proving the NSA developed malware targeting numerous systems." And "censored content posted by “Guccifer 2” that was potentially damaging to the reputation of the Democratic party."

Neither organizations have responded to requests by Lunduke to find out why they took those actions.

This comes after Twitter and Facebook came under fire for their censorship actions.

Lunduke poses the question:

When something that many people feel is important to their lives occurs and the major online platforms for disseminating that information censor them, what does that say about those platforms?


Facebook Knows Your Political Preferences ( 183

Facebook knows a lot more about its users than they think. For instance, the New York Times reports, the company is categorizing its users as liberal, conservative, or moderate. These details are valuable for advertisers and campaign managers, especially ahead of the election season. From a BusinessInsider report: For some, Facebook is able to come to conclusions about your political leanings easily, if you mention a political party on your page. For those that are less open about politics on social media, Facebook makes assumptions based on pages you like. As The New York Times explained, if you like Ben and Jerry's Facebook page and most of the other people that like that page identify as liberal, Facebook might assume you too are liberal.
Electronic Frontier Foundation

US Customs and Border Protection Wants To Know Who You Are On Twitter ( 348

An anonymous reader quotes a report from Electronic Frontier Foundation: U.S. border control agents want to gather Facebook and Twitter identities from visitors from around the world. But this flawed plan would violate travelers' privacy, and would have a wide-ranging impact on freedom of expression -- all while doing little or nothing to protect Americans from terrorism. A proposal has been issued by U.S. Customs and Border Protection to collect social media handles from visitors to the United States from visa waiver countries. The Electronic Frontier Foundation opposes the proposal and has commented on it individually and as part of a larger coalition. "CBP specifically seeks 'information associated with your online presence -- Provider/Platform -- Social media identifier' in order to provider DHS 'greater clarity and visibility to possible nefarious activity and connections' for 'vetting purposes,'" reports EFF. "In our comments, we argue that would-be terrorists are unlikely to disclose social media identifiers that reveal publicly available posts expressing support for terrorism." They say this plan "would unfairly violate the privacy of innocent travelers," would cause "innocent travelers" to "engage in self-censorship, cutting back on their online activity out of fear of being wrongly judged by the U.S. government," and would lead to a "slippery slope, where CBP would require U.S. citizens and residents returning home to disclose their social media handles, or subject both foreign visitors and U.S. persons to invasive device searches at ports of entry with the intent of easily accessing any and all cloud data."

BHU's 'Tiger Will Power' Wi-Fi Router May Be The Most Insecure Router Ever Made ( 62

An anonymous reader writes from a report via Softpedia: A Wi-Fi router manufactured and sold only in China can easily run for the title of "most insecure router ever made." The BHU router, whose name translates to "Tiger Will Power," has a long list of security problems that include: four authentication bypass flaws (one of which is just hilarious); a built-in backdoor root account that gets created on every boot-up sequence; the fact that it opens the SSH port for external connections after every boot (somebody has to use that root backdoor account right?); a built-in proxy server that re-routes all traffic; an ad injection system that adds adverts to all the sites you visit; and a backup JS file embedded in the router firmware if the ad script fails to load from its server. For techies, there's a long technical write-up, which gets funnier and scarier at the same time as you read through it. "An attacker authenticating on the router can use a hardcoded session ID (SID) value of 700000000000000 to gain admin privileges," reports Softpedia. "If he misspells the SID and drops a zero, that's no problem. The BHU router will accept any value and still grant the user admin rights."

Submission + - SPAM: Dying HP Printers: coincidence?

Stenboj writes: My westside home printer, an old HP75xx series recently died displaying "initializing" and unable to do anyting else including turn off. Today, now arriving at my eastside office for the first time since that event, I found that my somewhat younger HP310 series printer, when turned on, died displaying — you guessed it — "initializing", and unable to do anything else. Both have Wi-Fi network capability, but both are connected to the computer by USB. Both have aftermarket continuous-feed ink systems installed.

"Once is a misfortune; twice is a coincidence; three times is enemy action." Has it happened a third time to anyone, or perhaps more than one?

As a result of this I am dumping them both so the point is not to troubleshoot, but to pursue what might be an interesting story.

Link to Original Source

FBI Finds 14,900 More Documents From Hillary Clinton's Email Server ( 526

An anonymous reader quotes a report from ABC News: The FBI uncovered nearly 15,000 more emails and materials sent to or from Hillary Clinton as part of the agency's investigation into her use of private email at the State Department. The documents were not among the 30,000 work-related emails turned over to the State Department by her attorneys in December 2014. The State Department confirmed it has received "tens of thousands" of personal and work-related email materials -- including the 14,900 emails found by the FBI -- that it will review. At a status hearing Monday before federal Judge Emmett Sullivan, who is overseeing that case, the State Department presented a schedule for how it would release the emails found by the FBI. The first group of 14,900 emails was ordered released, and a status hearing on Sept. 23 "will determine the release of the new emails and documents," Sullivan said. "As we have previously explained, the State Department voluntarily agreed to produce to Judicial Watch any emails sent or received by Secretary Clinton in her official capacity during her tenure as secretary of state which are contained within the material turned over by the FBI and which were not already processed for FOIA by the State Department," said State Department spokesman Mark Toner in a statement issued Monday. "We can confirm that the FBI material includes tens of thousands of non-record (meaning personal) and record materials that will have to be carefully appraised at State," it read. "State has not yet had the opportunity to complete a review of the documents to determine whether they are agency records or if they are duplicative of documents State has already produced through the Freedom of Information Act" said Toner, declining further comment.

Comcast Says There's 6 Million Unhappy DSL Users Left To Target ( 141

Karl Bode, writing for DSLReports: As we noted last week, cable is effectively demolishing phone companies when it comes to new broadband subscriber additions, and Comcast still says the company has plenty of room to grow. Comcast and Charter alone added 500,000 net broadband subscribers last quarter, while the nation's biggest telcos collectively lost 360,783 broadband users during the same period. With AT&T and Verizon backing away from unwanted DSL users, and Windstream Frontier and CenturyLink only eyeing piecemeal upgrades, the bloodshed is far from over. Speaking this week at the Nomura 2016 Media, Telecom & Internet Conference, Comcast VP Marcien Jenckes stated that the company has plenty of unhappy DSL customers left to nab. In fact, Comcast says the company still has around 6 million DSL subscribers in its territory, many of which are likely frustrated by outdated speeds.

Submission + - Hoping FCC Regulations Can Stop Unjust Police Spying

Presto Vivace writes: Civil rights organizations are pursuing a novel strategy to stop the Baltimore Police Department's dragnet surveillance.

Color Of Change, Center for Media Justice and New America’s Open Technology Institute filed a complaint this week with the Federal Communications Commission, charging that the BDP’s use of mass cell phone surveillance devices known as Stingrays violates regulations of radio waves and cellular networks

Slashdot Top Deals

If you can't understand it, it is intuitively obvious.